Semaphore

Semaphore (pronounced sem-uh-fawr or sem-uh-fohr)

(1) A “line-of-sight” apparatus (mechanical, hand-held or activated and now even electronic) for conveying information by means of visual signals (typically flags or lights, the positions of which are changed as required).

(2) Any of various devices for signaling by changing the position of a light, flag or other identifiable indicator.  Historically, a common use of “semaphore” was as a noun adjunct (also called a noun modifier or attributive noun) including “semaphore flag”, “semaphore chart”, “semaphore operator et al.

(3) A codified system of signaling, especially a system by which a special flag is held in each hand and various positions of the arms denoting specific letters, numbers etc.  It remains part of Admiralty signals training.

(4) In biochemistry (as semaphoring), any of a class of proteins that assist growing axons to find an appropriate target and to form synapses.

(5) In biology (as semaphoront), an organism as seen in a specific time during its ontogeny or life cycle, as the object of identification or basis for systematics.

(6) In botany (as semaphore plant), a synonym for the telegraph plant (Codariocalyx motorius), a tropical Asian shrub, one of the few plants capable of rapid movement and so named because the jerking motions of the leaves recalled in observers the actions of the arms of Admiralty signallers and the name dates from the Raj.

(7) In programming, a bit, token, fragment of code, or some other mechanism which is used to restrict access to a shared function or device to a single process at a time, or to synchronize and coordinate events in different processes, the thread increments the semaphore to prevent other threads from entering the critical section at the same time.

(8) In figurative use (in human and animal behavior), certain non-verbal communications, used consciously and unconsciously, the concept often explored as a literary device.

(9) To signal (information) by means of semaphore

1814: From the French sémaphore, the construct being the Ancient Greek, σῆμα (sêma) (mark, sign, token) + the French -phore (from the Ancient Greek -φόρος (-phóros), the suffix indicating a bearer or carrier) and thus understood as “a bearer of signals”.  The Greek –phóros was from pherein (to carry), from the primitive Indo-European root bher- (to carry).  The verb was derived from the noun.  Semaphore is a noun & verb, semaphorist, semaphoront & semaphorin are nouns, semaphored is a verb, semaphoring is a verb & adjective, semaphoric & semaphorical are adjectives and semaphorically is an adverb; the noun plural is semaphores.  The noun semaphorism is non-standard but is used in behavioral linguistics to describe patterns of language used to convey meaning in a “coded” form which can be deconstructed for meaning only by sender and receiver.  The form semaphoreology seems not to exist but if anyone ever makes a discipline of the study semaphore (academic careers have been built from some improbable origins), presumably there will be semaphoreologists.

Chart of the standard semaphore alphabet (top left), a pair of semaphore flags (bottom left) and Lindsay Lohan practicing her semaphore signaling (just in case the need arises and this is the letter “U”), 32^nd birthday party, Mykonos, Greece, July, 2018 (right).

Semaphore flags are not always red and yellow, but the colors are close to a universal standard, especially in naval and international signalling.  There was no intrinsic meaning denoted by the use of red & yellow, the hues chosen for their contrast and visual clarity, something important in maritime environments or other outdoor locations when light could often be less than ideal although importantly, the contrast was sustained even in bright sunshine.  Because semaphore often was used for ship-to-to ship signalling, the colors had to be not only easily distinguishable at a distance but not be subject to “melting” or “blending”, a critical factor when used on moving vessels in often pitching conditions, the operator’s moving arms adding to the difficulties.  In naval and maritime semaphore systems, the ICS (International Code of Signals) standardized full-solid red and yellow for the flags but variants do exist (red, white, blue & black seem popular) and these can be created for specific conditions, for a particular cultural context or even as promotional items.

L-I-N-D-S-A-Y-space-L-O-H-A-N spelled-out in ICS (International Code of Signals) semaphore.  One can never tell when this knowledge will come in handy.

Early automobiles were sometimes fitted with mechanical semaphore signals to indicate a driver’s intention to change direction; these the British called “trafficators” (“flippers” in casual use) and they were still being fitted in the late 1950s, by which time they’d long been illuminated to glow a solid amber.  What the mechanical semaphores did was use the model of the extended human arm, used by riders or drivers in the horse-drawn age to signal their intentions to others and although obviously vulnerable to damage, the devices were at the time a good solution although the plastics used from the 1930s were prone to fading, diminishing the brightness.  When electronics advanced to the point where sequentially flashing turn indicators (“flashers”) cheaply could be mass-produced the age of the semaphore signal ended although they did for a while persist on trucks where they were attached to the exterior of the driver’s door and hand activated.

Hand-operated semaphore signal on driver's door of RHD (right-hand-drive) truck (left), an Austin A30 with electrically-activated semaphore indicating impending leftward change of direction (centre) and electrically-activated right-side semaphore on 1937 Rolls-Royce Phantom III Gurney Nutting Touring Limousine (right).

The A30 (1952-1956) was powered by an 803 cm³ (49 cubic inch) four cylinder engine while the Phantom III (1936-1939) was fitted with a 7338 cm³ (447 cubic inches) V12 (noted diarist Sir Henry “Chips” Channon (1897–1958) owned one) so the driving experience was very different but both used the same Lucas semaphore assembly.  Note the "BEWARE, TRAFFICATORS IN USE" notice in A30's rear window.  Because drivers are no longer attuned to look for the now archaic semaphores, some jurisdictions (while still allowing their operation), will permit road registration only if supplementary flashing indicators (now usually amber) are fitted.  In the 1960s many trafficator-equipped cars were modernized with flashers and it's now only collectors or restorers who prize the originality of the obsolete.

Left & right semaphore signals (trafficators): Lucas part number SF80 for one’s Austin A30, Morris Minor or Rolls-Royce Silver Wraith.  In the 1950s, the price may have varied between resellers.

Although the grim realities of post-war economics meant standardization began to intrude, even in the 1950s Rolls-Royce made much of things being “bespoke” and while that was still true of some of the coach-work, what lay beneath the finely finished surface was often from the industry parts-bin and the semaphore turn signals the company fitted to the Silver Wraith (1946-1958) and Silver Dawn (1949-1955) was Lucas part number SF80 and exactly the same component used by the humble Austin A30 and Morris Minor (1948-1971) where the functionality was identical.  Presumably were one to buy the part from Rolls-Royce one would have been charged more (perhaps they wrapped in more elaborate packaging) and that’s a well-understood industry phenomenon.  The internet has made it easier to trace such commonalities but in the 1980s there was a most useful publication which listed shared part-numbers which differed only in the prices charged, a switch for a Lamborghini which might retail for hundreds available from the Fiat parts counter (a busy place) for $12 while those aghast at the price quoted for a small linkage in a Triumph’s Stag’s induction system were pleased the same thing could be bought from a Ford dealer for a fraction of the cost.  Rolls-Royce fitted their last trafficator in 1958 and when Austin updated the A30 as the A35 (1956-1968) flashers were standard equipment, metal covering the apertures where once the semaphores had protruded while internally there was a panel concealing what had once been an access point for servicing.  The Morris Minor, the last of which wasn’t (in CKD (completely knocked down) form) assembled in New Zealand until 1974(!) switched from trafficators to flashers in 1961, the exterior and interior gaps concealed al la the A35.

Left-side semaphore on 1951 Volkswagen Type 1 (Beetle).

The Latin sēmaphorum (the alternative form was sēmaphoru) is thought to be a calque of the Italian semaforo (traffic light), again borrowed from the French sémaphore in the literal sense of “signaling system”.  The modern Italian for “traffic light” is semaforo although (usually for humorous effect) sēmaphorum is sometimes used as Contemporary Latin.  Traffic lights have for over a century regulated the flow of vehicles in urban areas but the first semaphore signal predated motorized transport, installed in London in 1868.  It was introduced not because it would perform the task better than the policemen then allocated but because it was cheaper and was an example of the by then common phenomenon of machines displacing human labor.  The early mechanical devices were pre-programmed and thus didn’t respond to the dynamics of the environment being controlled and that applied also to the early versions of the now familiar red-amber-green “traffic lights” which began to proliferate in the 1920s but by the 1950s there were sometime sensors (weight-sensitive points in the road) which could “trigger” a green light if the pre-set timing was creating a needless delay.  Even before the emergence of AI (artificial intelligence) in the modern sense of the term, implementations of AI had been refining the way traffic light systems regulated vehicular flow and in major cities (China apparently the most advanced), cameras, sensors, face and number plate recognition all interact to make traffic lights control the flow with an efficiency no human(s) could match.

ASMR semaphore porn: 1955 Austin A30.  ASMR (Autonomous Sensory Meridian Response) describes the physical & psychological pleasure derived from specific stimuli (usually a sound).  For some this can be the sound of South Korean girls on TikTok eating noodles while for others it can come from hearing semaphore turn-signals being raised and lowered.

Whether it was the early semaphore signals or the soon to be ubiquitous illumined red-amber-green lights, what the system relied on was compliance; inherently, lacking physical agency, a piece of colored glass can’t stop a car but that almost always is the effect of a “red light”.  In behaviorism, this was described as discriminative stimulus (SD) in that the red light culturally is understood as a universal cue signalling a punishment might follow any transgression (ie “running the red light”), thus the incentive to obey the signal and avoid negative consequences (crashing or being fined).  What SD does is control behavior through learned association.  The use of red comes from semiotics and the color is culturally assigned to “stop” (as green is to “go”, these allocated by virtue of historical associations which long pre-date the technology in the same way semiotics are used (and red & blue) to denote “hot” & “cold” water when taps are labelled, meaning for travellers no knowledge of a local language is needed to work out which is which.  In the jargon, the red light is a “signifier” and the “signified” is stop.

Modern Mechanix magazine, January 1933.

Sir William Morris (1877-1963; later Lord Nuffield) held a number of troubling and even at the time unfashionable views and he’d been sceptical about producing the Morris Minor, describing the prototype as looking “like a poached egg”; in that he was right but the Minor proved a highly profitable success.  In the 1930s however, he did have the imaginative idea of adapting the by then familiar traffic light (in miniature form) to the automobile itself.  The concept was sound, Sir William’s proposed placement even anticipating the “eye level brake lights” of the 1980s and the inclusion of green in the code was interesting but the “mini traffic light” wasn’t taken up and lesson which should have been learned is that in the absence of legislation compelling change, the industry always will be most reluctant to invest and not until the 1960s would such mandates (for better and worse) begin to be imposed.

1947 Volvo P444 (1947-1958, left) and 2022 Volvo XC 40 (introduced 2017, right).  Volvo abandoned the semaphores years before the British but the designers clearly haven’t forgotten, the rear reflectors on the XC 40 using the shape.  Volvo also adopted the conventional flasher but not before the modernist Swedes had tried the odd inventive solution.

In idiomatic use, semaphore’s deployment tends to be metaphorical or humorous, the former used as a literary device, borrowed from behavioral psychology.  “To semaphore” can mean “wildly or exaggeratedly gesture” but can also convey the idea of a communication effected without explicitly stating something and that can either be as a form of “unspoken code” understood only between the interlocutors or something unconscious (often called body-language).  “Semaphoring a message” can thus be either a form of secret communication or something inferred from non-verbal clues.  Authors and poets are sometimes tempted to use “semaphore” metaphorically to describe emotional cues, especially across physical or emotional distance and one can imagine the dubious attraction for some of having “her sensuous lips silently semaphoring desire” or “her hungry eyes semaphored the truth”.  Among critics, the notion of “semaphoring” as one of the motifs of modernist literature was identified and TS Eliot’s (1888–1965) style in The Waste Land (1922) included coded fragments, often as disconnected voices and symbols, called by some an “emotional semaphore”, and Samuel Beckett (1906-1989 and another Nobel laureate) was noted for having his characters exchange their feelings with repetitive gestures, signals and critically, silences, described variously as “gestural semaphore” or the “semaphoring of despair”.

Cup

Cup (pronounced kuhp)

(1) A small, open container now manufactured usually using ceramics, plastic, glass or metal, typically with a single handle and used as a receptacle from which to drink fluids (tea, coffee, soup etc) and often categorized by design according to their nominal use (tea cup, coffee cup etc); many cups are supplied in sets with a saucer on which the cup sits protecting surfaces from spillage and offer a place on which a stirring spoon may sit.  A cup can be made from glass but may not be a “glass” while a glass made from glass may also have a handle while mugs are essentially cups but called something else.

(2) The bow-like part of a goblet or the like.

(3) A cup with its contents (“a cup of tea” etc).

(4) The quantity contained in a cup (which can be a general reference to any cup or a precisely defined measure).

(5) As a customary unit of measure, a defined unit of capacity frequently used in cooking, the quantum of which varies between (and sometimes within) markets but historically based on a half pint (now usually expressed as 220-250 ml or 14-20 tablespoons).  Measuring cups are available with graduations.

(6) An ornamental bowl, vase, etc especially of precious metal, offered as a prize for a contest (the use of “cup” often persisting even when trophies have been re-designed in a different form); a sporting contest in which a cup (or some other trophy) is awarded to the winner (collective known as the “cup competitions”).

(7) Any of various mixed beverages with one ingredient as a base and historically served from a bowl (claret cup burgundy cup, gin cup, cider cup etc).

(8) In Christianity, the chalice used in the Eucharist (used also of the consecrated wine of the Eucharist).

(9) Something to be partaken of or endured; one's portion, as of joy or suffering.

(10) In many fields, any cup-like utensil, organ, part, cavity etc; anything resembling a cup in shape or function.

(11) In botany, parts such as the flower base of some plants.

(12) In women’s underwear, the two forms containing the breasts in a bra or other garment in which an apparatus with a similar function is integrated (camisoles, bathing suits etc).

(13) In certain sports, a concave protective covering for the male genitalia, reinforced with usually with rigid plastic or metal (in some markets called a “box”, “cup” the common form in North America).

(14) In golf-course construction, the metal receptacle within the hole or the hole itself.

(15) In astronomy, a constellation or a crater.

(16) In pre-modern medicine, as “cupping glass”, a glass vessel from which air can be removed by suction or heat to create a partial vacuum, formerly used in drawing blood to the surface of the skin for slow blood-letting (also called the “artificial leech”).  The concept (cupping) remains in use (though without the blood-letting) in certain beauty treatments popular in East-Asia.

(17) In metalworking, a cylindrical shell closed at one end, especially one produced in the first stages of a deep-drawing operation; to form (tubing, containers etc) by punching hot strip or sheet metal and drawing it through a die.

(18) In mathematics, the cup-like symbol ∪, used to indicate the union of two sets.

(19) As CUP, the international standard (ISO 4217) currency code for the Cuban peso.

(20) In tarot card reading, a suit of the minor arcana or one of the cards from the suit.

(21) In ultimate frisbee competition, a defensive style characterized by a three player near defense cupping the thrower (or those three players).

(22) A flexible concave membrane used temporarily to attach a handle or hook to a flat surface by means of suction (the “suction cup”, the origins of which were in biomimicry (octopodes et al)).

(23) To take or place in, or as in, a cup.

(24) To form into a cuplike shape.

Pre-1000: From the Middle English cuppe & coppe, created by a blending of the Old English cuppe (cup) and the & Old Northumbrian copp (cup, vessel), from the Late Latin cuppa which etymologists list as being of uncertain origin but thought probably a variant of the earlier cūpa (tub, cask, tun, barrel) which may have been cognate with the Sanskrit kupah (hollow, pit, cave), the Greek kype (gap, hole; a kind of ship), the Old Church Slavonic kupu, the Lithuanian kaupas, the Old Norse hufr (ship's hull) and the Old English hyf (beehive).  Etymologists are divided on whether the source of the original Latin was the primitive Indo-European kewp- (a hollow) or the non Indo-European loanword kup- which was borrowed by and from many languages.  The Old English copp was from the Proto-West Germanic kopp (round object, bowl, vessel, knoll, summit, crown of the head), from the Proto-Germanic kuppaz, from the primitive Indo-European gew- (to bend, curve, arch), the source also of the obsolete English cop (top, summit, crown of the head) and the German Kopf (top, head).  The Middle English word evolved also under the influence of the Anglo-Norman cupe & the Old French cope & coupe.  The Late Latin cuppa begat many words meaning “cup” including the Old French coupe, the Saterland Frisian & West Frisian kop, the Old Frisian kopp, the Italian coppa, the Middle Dutch coppe, the Dutch kop & kopje, the Middle Low German kopp, the German Low German Koppke & Köppke, the Danish kop, the Spanish copa and the Swedish kopp.  It was a doublet of coupe, hive and keeve.  The German cognate Kopf now means exclusively “head”.  The first cups doubtlessly were formed by a “cupping” of the hands in order to drink and that action would have been pre-human and an important evolutionary step in the development of the brain.  Later, whatever fell conveniently to hand (sea-shells, the shells of nuts etc) would have been used before drinking vessels came to be fashioned from clay, wood or other materials.  Cup is a noun & verb, cupped & cupping are verbs; the noun plural is cups.

Art Deco and the coffee cup.

By the late fourteenth century, “cup” had come to be used of just about in the shape of what is now understood as a cup, the sense of “quantity contained in a cup” emerging about the same time.  The sense of a “cup-shaped metal vessel offered as a prize in sport or games” dates from the 1640s, the origin thought to be the traditional ceremonial ritual of celebrating victory by drinking wine or some other alcoholic brew and while it’s speculative, anthropologists have suggested there may be some symbolic link with the idea of “drinking the blood of the vanquished”.  The idea obviously persists, and among the more disgusting versions is drinking from a shoe or boot worn by the victor during the event.  That particular form of podophilic mixology actually has a long history but of late it’s become something of a fetish on the podiums in motor-sport; the term “shoey” was coined in the barbarian nation of Australia.

The origin of the use of “one cup in life” is in the Biblical scripture: And he went a little further, and fell on his face, and prayed, saying, O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as thou wilt. (Matthew 26:39 (King James Version (KJV, 1611))).

The word cup appears in many scriptural verses which refer to God's judgment or a time of great suffering, Christ Himself asking James and John if they could "drink the cup" (Matthew 20:22) assigned to Him (by which he meant the suffering He soon would endure on the cross, experiencing God's judgment for the sins of humanity.  It’s an important theological point, emphasized (Hebrews 4:15) by Jesus seeming to be overwhelmed and saddened by the prospect and awfulness of his impending crucifixion, praying to God he be spared this fate.  Jesus was, although the son of God, also fully human and few humans wish to suffer humiliation, torture, and death so his prayer was natural but critically, almost at once he submits and resolves to obey the will of the Father.  Whatever his human anguish at what is to come, his absolute commitment was to obeying God.  The idea then is that “suffering is to be endured” was by the fourteenth century expressed in phrases like “the cup of life” and whatever may be the cup, it is “something to be partaken of” because it is the will of God.  In figurative use thus, “one’s cup” is that which is one’s lot to be endured; that which is allotted to one for good and bad whether it be paradise on Earth or nailed to the cross at Golgotha.

The daffodil (one of the common names of flowers of the genus Narcissus); as in many flowers, the alternative name for the corona is the cup.

To be in one's cups was to be “intoxicated”, a use dating from the 1610s which may have been a direct development from the mid-fourteenth century Middle English cup-shoten (drunk, drunken).  One’s “cup of tea” is what interests one and came into use in the 1930s of things or concepts although it’s documented from 1908 applying to persons; tellingly, the use of “not my cup of tea” is more common.  The “cup-bearer” was an early fifteenth century job description to describe the “attendant at a feast who conveys wine or other liquor to guests” but a more specialized use was of the court official who carried with him the cups, plates and other utensils to be used by those fearing poisoning (usually royalty or feudal barons).  The phrase “storm in a tea cup” refers to a fuss being made over a trivial matter and is in the same vein as “much ado about nothing”, “tempest in a teapot”, “storm in a teapot”, “lightning in a bottle” and “make a mountain out of a molehill”.

America's Cup (left), FIFA World Cup (centre) and William Webb Ellis Cup (left).

In sport, cups are a popular choice as trophies and they range from small ones in anodised plastic to large, heavy constructions plated in gold or silver.  The America's Cup is contested in yacht racing and, first awarded in 1870, is the oldest international sporting competition still running.  Informally, competitors call it the “Auld Mug”.  The Fédération Internationale de Football Association’s (FIFA, the International Federation of Association Football) World Cup was first contested in 1930 with the tournament since run at four year intervals (skipping 1942 & 1946 because of World War II (1939-1945)).  The name “World Cup” remains although the trophy hasn’t, in the conventional sense of the word, actually been a cup since 1974, the last year the finals were contested by 16 teams (there will be 48 in 2026).  The Webb Ellis Cup is the premier trophy in international rugby and since 1987 tournaments have been run every four years.  The cup is named after English Anglican clergyman William Webb Ellis (1806–1872) who, according to legend, while a pupil at Rugby School, Webb Ellis ignored the rules of the football game he was playing, picking up the ball and running with it “…thereby creating rugby.”  There’s no satisfactory evidence to support the tale and within the game there’s the joke what Webb Ellis invented was rugby's (some say Rugby School's) tradition of theft.

Example of the idiomatic use of cup in the phrase “one’s cup runneth over”: Model Adriana Fenice (b 1994) in 32G (10G or anything between 70-82G depending where sold) bra.

The verb use “to cup” was a part of pre-modern medicine by the fourteenth century, describing the use of something cup-like to press against the skin to draw blood closer to the surface prior to “slow blood-letting”.  Medical dictionaries note there were two modes of cupping: one in which the part is scarified and some blood taken away to relieve congestion or inflammation of internal parts (“wet cupping”, or simply “cupping”), the other in which there was no scarification no blood was abstracted (“dry cupping”).  The concept (as “cupping” and without the bleeding) is still used in certain beauty treatments popular in East-Asia.  The cupful (quantity; that a cup holds, contents of a cup) was known in late Old English and persists to this day, the phrase “cup runneth over” is used to refer an over-supply of anything and was from the Hebrew Bible (Psalms:23:5) where the message was “I have more than enough for my needs” and thus a caution against greed, or in the words of Johann Sebastian Bach (1685–1750): Ich habe genug (I have enough) an unfashionable view in a materialist age although one with which Ms Fenice might concur.  Modifiers are appended as required, hyphenated and not including the teacup (circa 1700), the egg-cup (used for making the eating of boiled eggs easier (1773)) and the cupcake (1828).  Cupcakes were “small cakes intended for one” and were an invention of US English, the name derived either from cup-shaped containers in which they were baked or from the small measures of ingredients used.  The slang use to describe an “attractive young woman” was another American innovation from the 1930s.

Art Deco and the tea cup: 1934 "Tango" trio by Royal Doulton in bone china, the cup with the classic pointed handle.

The use of “cup” in recipes is probably one of the less helpful uses of the word and for those not familiar with the conventions, they were probably baffled and wondering which of the various sized cups they had should be used.  The origin of “cup” as a measure lies in the old English unit which was ½ an imperial pint and thus (10 imperial ounces (284 ml), often later rounded to 300 ml.  Elsewhere, countries did their own thing: In Australia & New Zealand it was set at 250 ml after the conversion to metric measurements in 1973; In the US it was a liquid measure equal to 8 fluid ounces (237 ml which was usually rounded to 240); In Canada it was set at 8 imperial ounces (227 ml and rounded to 250).  The “metric cup” is now a universal 250 ml and for recipes this appears to be the preferred use even in North America.

Bra cups

Example of the idiomatic use of cup in the phrase "storm in a D Cup": Lindsay Lohan in demi-cup bra, from a photoshoot by Terry Richardson (b 1965) for Love magazine, 2012.

If in cooking "cup" has been (just about) standardized around the world, the bra cup, that other use of cup as an expression of volume is bafflingly diverse, anomalies appearing even within a manufacturer's catalogue.  The use of cup in the bra business seems to have begun in the 1930s although among historians of the bra (a surprisingly well populated niche in the discipline of the history of fashion) many differ in detail; the vague consensus seems to be the term was first used in this context in the early 1930s, was wide-spread by 1940 and almost universal by the early 1950s.  The principle of the cup size was compelling simple in that there were two variables (1) the torso and (2) the breasts.  The measurement of the torso was expressed by the bra band size (measured under the bust) in inches (or its metric equivalent) such as 30”, 32”, 34” etc, the graduations between the numbers handled by the fastening mechanism (usually a hook & eye arrangement) allowing a “tight” or “loose” fit so a 32” band could be worn by someone with a torso measurement in a 31-33 inch range.  The cup size range corresponded with the volume of the breast and (in ascending order) these were expressed in letters: A, B, C, D etc so when combined, the products were called 32B, 34C etc.  In theory, the two values worked progressively (up & down: alphabetically & numerically) so the cup size of a 32C was the same as a 30D and a 34B; in the industry, the concept is called "sister sizes", each cup the same dimensions but mounted on a different sized structure (defined by the back-band) and labelled accordingly.  That's the theory and within a manufacturer's single range it may often be true but there is no recognized definition for cup sizes so not only are any two 32Cs from different manufacturers likely to be a slightly different size, nor can it be expected the dimensions of the cup of any 30D will align exactly with that of any other 34B.  It may but it can't be predicted and the expectation should be it will likely "tend towards".

Maaree's graphical depiction of the "sister size" concept.  The point is that while band size is an absolute (expressed usually in inches or centimetres), cup size can be an absolute (within the same band size) or a comparative (when applied to different band sizes. 

English borrowed the word brassiere from the French brassière, from the Old French braciere (which was originally a lining fitted inside armor which protected the arm, only later becoming a garment), from the Old French brace (arm) although by then it described a chemise (a kind of undershirt) but in the US, brassiere was used from 1893 when the first bras were advertised and from there, use spread.  The three syllables were just too much to survive the onslaught of modernity and the truncated “bra” soon prevailed, being the standard form throughout the English-speaking world by the early 1930s.  Curiously, in French, a bra is a soutien-gorge which translates literally and rather un-romantically as "throat-supporter" although "chest uplifter" is a better translation.  The etymological origin of the modern "bra" lying in a single garment is the reason one buys "a bra" in the same department store from which one might purchase "a pair" of sunglasses or trousers, both of which, centuries ago, began as two separate items.

The authoritative Honeylove’s comprehensive guide to bras suggest the absolute minimum number a wearer should own is three on the basis of (1) one in the bra drawer, (2) one in the wash and (3) the one being worn; their recommended number is higher but three is the functional minimum.  That was based on essentially the same calculation used in 1939 (a time when the orthodoxy in German military circles was a general European war would not happen before 1942-1943 at the earliest), when the head of the Kriegsmarine's (German navy) Unterseeboote (submarine) arm (Grand Admiral Karl Dönitz (1891–1980; head of the German Navy 1943-1945, German head of state 1945)) recommended that for the submarine to be an effective strategic weapon, at any time 100 would need to be deployed at sea.  That would demand a fleet of 300 because in addition to the 100 active, 100 would be either in transit to position or returning to base while another 100 would be in their pens being repaired, serviced or re-fitted.  Unfortunately for Dönitz, at the outbreak of World War II (1939-1945), his fleet numbered not even 60, fewer than half of which were suited to a campaign on the high seas but even then, the U-boats proved a potent weapon a great threat to the British, the critical dangers not overcome until 1942.  Had Germany entered the war with a fleet of even 150, the course of the Battle of the Atlantic would have been very different.       

Bra size multi-national conversion chart by Fredericks of Hollywood.

Like the footwear business, it seems an industry crying out for an ISO (International Organization for Standardization) but while something buyers might welcome, it seems unlikely industry would share the enthusiasm.  Sizing systems for shoes and bras evolved independently in different regions, based either on local traditions and preferences or just wholly arbitrary choice and there would be much commercial resistance to having to change long-established conventions, something which would necessitate updating labels, packaging & advertising, as well as re-educating initially baffled consumers.  Obviously, that would be costly and therefore lobbied against.  ISO 19407:2015 does provide guidelines for converting shoe sizes between regions but that’s more an acknowledgement of a problem (and a “sort-of”) work-around than a solution and the ISO seems never to have contemplated bras.  Probably, the only way such ISOs could successfully be imposed would be to give industry a long lead-time (perhaps 25-30 years) to permit an orderly and phased world-wide introduction but realistically, few are expecting progress.

Unfortunately the manufacturers complicated things in a number of ways.  Given the A,B,C,D ascending sequence, it would have been reasonable to assume E,F,G & H would follow and in some cases they did but not all, some adopting a double letter convention yielding DD, EE etc but these did not represent fractional sizing-steps between single letters; what was to some manufacturers a DD was an E to others and some were so taken with the idea they added triple lettered sizes so a 32DDD was nominally the equivalent of a 32F from another house.  Some quirks were understandable such as the one which explains the rarity of the I cup, the explanation being the character might be confused with a numeric "1" which, given the syntax of the system, seems improbable but one can see their point.  Although there are a few "I cup" bras, most manufacturers skip the letter and either leave a nominal gap between the "H" & "J" cups or include a "HH" cup in the range (although there are the odd few who stop at "G" and handle icremental increases in volume with "GG" & "GGG".  It's only the descriptions where there's a lacuna, the actual cup sizes on offer still graduated although it can be mystifying because, between manufacturers, the same size can actually be tagged as "H", "I", "HH", "J" or even "GGG" and while that can make in-store shopping merely time-consuming, for on-line shoppers it makes life especially difficult, the the attraction of an ISO.  

1962 Chrysler 300H (left) and 1963 Chrysler 300J (right).

Chrysler in the US, not wanting the market to think there was a "3001", was in 1963 guided by the same rationale when for the first time since 1956 a letter was skipped in the designation of the 300 “letter series” cars; there’s nothing to suggest the corporation ever pondered a “300HH”.

The BUFF: The new version of the Boeing B-52 Stratofortress (replacing the B-52H) will be the B-52J, not B-52I or B-52HH.   

The US Air Force also opted to skip “I” when allocating a designation for the updated version of the Boeing B-52 Stratofortress (1952-1962 and still in service).  Between the first test flight of the B-52A in 1954 and the B-52H entering service in 1962, the designations B-52B, B-52C, B-52D, B-52E, B-52F & B-52G sequentially had been used but after flirting with whether to use B52J as an interim designation (reflecting the installation of enhanced electronic warfare systems) before finalizing the series as the B-52K after new engines were fitted, in 2024 the USAF announced the new line would be the B-52J and only a temporary internal code would distinguish those not yet re-powered.  Again, the “I” was not used so nobody would think there was a B-521.  Although the avionics, digital displays and ability to carry Hypersonic Attack Cruise Missile (HACM, a scramjet-powered weapon capable exceeding Mach 5) are the most significant changes for the B-52J, visually, it will be the replacement of the old Pratt & Whitney TF33 engines with new Rolls-Royce F130 units which will be most obvious, the F130 promising improvements in fuel efficiency of some 30% as well as reduction in noise and exhaust emissions.  Already in service for 70 years, apparently no retirement date for the B-52 has yet been pencilled-in.  In USAF (US Air Force) slang, the B-52 is the BUFF (the acronym for big ugly fat fellow or big ugly fat fucker depending on who is asking).  From BUFF was derived the companion acronym for the LTV A-7 Corsair II (1965-1984, the last in active service retired in 2014) which was SLUFF (Short Little Ugly Fat Fellow or Short Little Ugly Fat Fucker).

Under the A-B-C-D etc cup-sizing system, a given designation varies in dimensions (and thus volumetric capacity) according to the band size, the cup of a 28A smaller than that of a 32A (which should share size and shape with that used on a 30B).   

The theory: Individual results may vary.

Then there was the band size.  Most countries of course use the metric system so dimensions had to be converted but the convention for those advertised in inches was to use increments of 2 (28, 30, 32 etc) while for metric users it was in jumps of 5 cm (70, 75, 80 etc) which is close but not quite the same (28” = 71.12 cm; 30” = 76.2 cm; 32 = 82.28 cm).  More of a problem was that for the system to work, some math was required because the number from the under-bust measurement didn’t directly translate to the advertised bra size: What the buyer had to do was take the number and add 5 inches (12.7 cm) so if one’s under-bust measurement was 29” (73.7 cm), one (at least in theory) needed something with a 34” band (86.4 cm, the closest in the metric countries being the 85 cm range).  However, if the number was over 33” (83.8 cm), then one added only 3” (7.6 cm).  At that point, one needed to determine the appropriate cup.  This required a further measurement, one taken which represented the bust at its fullest projection, the somewhat misleadingly named “over-bust” number which was actually taken following the nipple line.  Many recommended taking it while wearing a bra but if that was a poor fit, that would hardly be helpful and the ideal method turned out to be (and usually this was necessary only if the volume was above a certain point) holding the breasts in place at the desired location while another did the measuring.  An ideal project then in which to involve one’s boyfriend or girlfriend, the only instructions needed being (1) the tape should rest lightly on the skin and (2) it should straight across the back, parallel to the floor.  The relationship between the over-bust measurement and the band size indicated the needed cup size: if the difference is 1” (2.54 cm) then it dictates an A cup; 2” (5.08 cm) and it’s a B cup and so on.  In many cases the simple under/over equation will work but not in all and some authorities have added additional measurements to be taken while in different positions, the 6 listed including lying flat on one's back and leaning forward so the breasts are perpendicular to the ground.  Definitely, the more dimensions which are taken, the more this seems a job for two.  

The math of cup sizes.

In practice it transpired the human body wasn’t so accommodating of production line rationalization but the system worked well enough for it to have endured for decades although only a percentage of women find an ideal fit without the help of an in-store fitter.  Quite what that number is depends on who is asked but it’s clear it’s a long way short of 100%.  The outcome for bra wearers wasn’t helped by the lack of standardization in either the labeling or the technical specification of the cup size.  The inches vs centimetres thing was manageable but even in some countries which had long switched to the metric system, bras sizes were often expressed in inches (a similar aberration to the (almost) universal use of inches for certain products including the wheels used on cars and computer monitors) and because of the internationalized nature of the market with so much imported product, in many countries, both sizing regimes simultaneously were on sale, often in the same shop.  Helpfully, many displayed wall charts with conversion tables.  For some reason, in Australia and New Zealand, the decision was taken to use the dress sizing standard used in the antipodes (8 = 30”, 10 = 32” etc), thus bra sizes like 8C, 10D etc which local users presumably adapted to but it seems a needless complication.  Additionally, regardless of what country one was in, there was no guarantee a given size from one manufacturer would exactly align with that from another and in England, a comparison by a consumer organization revealed band and cup size differences existed in stated sizes even between various styles produced by the same manufacturer; not all 32Ds were created equal.  Given that, it seems obvious it’s best to seek the assistance of a fitter but in the internet age, customers found capitalism offered a handy on-line, home delivered alternative, the trick being to order half a dozen bras of slightly different declared sizes (eg 32C, 30D, 32E etc), the ones not quite right being able to returned for credit at no cost, the site paying all the P&H (postage & handling).  That approach has attracted much criticism because of the environmental impact and it’s a significant cost to the distributor and some have now moved to restrict the practice.

Details of fifteenth century bras in Linen from Austria.

Although it wasn’t until well into the twentieth century the idea of cup sized was codified (though to this day not standardized), the concept turned out to be ancient, something confirmed in 2008 when, as part of her PhD research, Austrian anthropologist Beatrix Nutz was undertaking at the University of Innsbruck in Austria, retrieved from the dirt, wood and straw (all discarded stuff apparent used as insulation) of centuries ago in the foundations of an Austrian castle, four linen bras among some 4000 textile fragments.  What was striking was the medieval garment was the similarity to the version first patented in the United States in 1914 something perhaps unsurprising as there really is only one way to achieve the functional effect desired if a minimalist approach is pursued and that’s what was done, a few centuries apart.

Fifteenth century "longline" bra in Linen from Austria, the midriff-enveloping fabric originally extending beneath the cups.

The detailing on the garments would be familiar to those bra shopping in the twenty-first century, the lower ends decorated with finger-loop-laces, sown on with lace-stitches, resulting some simple needle-lace decoration.  There’s structural overlap too, one of the unearthed bras in the style of the “longline” bras which first became popular in the 1930s, both representing the practical expedient of combining a type of corset with a bra.  Clearly, while not necessarily something with wide commercial availability, garments in the style of the linen bras must have been well-known (at least in certain circles because in French texts as early as 1315 CE there are mentions of the “breast bags” or “shirts with bags” women used to support and restrain their breasts and one disapproving author called them “indecent” although it seems his objection was to “breasts too large” rather than the pre-modern lingerie used to minimize their appearance and the longest known surviving fragment in this vein is a verse from fifteenth century Vienna:

Ir manche macht zwen tuttenseck
Damit so snurt sie umb die eck,
Das sie anschau ein ieder knab,
Wie sie hübsche tütlein hab;
Aber welcher sie zu groß sein,
Die macht enge secklein,
Das man icht sag in der stat,
Das sie so groß tutten hab.

Translation:

Many a woman makes two bags for the breasts,
with them she roams the streets,
so that all the guys look at her,
and see what beautiful breasts she has got;
But whose breasts are too large,
makes tight pouches,
so it is not told in the city
that she has such big breasts.

Nursing bras use specialized cups: Lindsay Lohan inspects the apparatus in Labor Pains (2009).

The most obvious specialized cup is that used with nursing bras which feature an arrangement whereby most of the cup’s fabric can be semi-separated from the superstructure, enabling breast-feeding without the need to remove the whole garment.  Among bra manufacturers, there are different implementations by which the functionality of a nursing bra's apparatus is achieved and presumably chest-feeders (the preferred term among the woke to describe those who used to be called “breast-feeding women”) choose whichever best suits them; it may simply be that for manufacturers the production-line rationalization achieved by being able to adapt the specialized cups to the structures used for conventional bras is compelling, dictating the designs.  Which chest-feeders choose is of some significance given how often heard is the complaint the process is “tiring”.  To those who will never be chest-feeders it sounds more a pleasant and diverting relaxation rather than anything tiring but they all say it so it must be true.

The "push-up" bra (the best-known of which is the "Wonderbra") lives up to its name by using strategically placed padding which has the effect of "pushing up" the breast tissue (it has nowhere else to go), creating the visual effect of something bigger and higher.  Most padding is purely functional but there are also novelty items such as the one above which is variant of the "hand bra", also a thing.  

The cupless: A "special purpose" bra available in S, M, L & XL.

Other variations include the demi-cup (also called the half-cup ("semi-cup" not a recognized term)), the bullet cup, the adhesive cup (an enlarged & shaped adaptation of the so-called "tit-tape" technology), the padded cup and the seemingly paradoxical cupless (or open-cup), the last a niche market.  Those wanting to have "their cake and eat it too" who like to go braless while enjoying the benefit of some support can buy clothes with a "built-in bra" or a "shelf-bra" although the law of physics continue to operate and beyond a certain size (and more to the point: mass), these things simply: "don't work".  The cups of a "push-up bra" include thick padding towards the bottom of the structure, this having the effect of "pushing up" the breast tissue, lending things a higher, fuller look.  There are degrees to which this can be implemented: the more the padding, the greater the effect.

Vaquera’s crew neck T-shirt with trompe l'oeil underwear.  Despite the model’s expression (it’s part of their training for the catwalks), the look really should be worn for fun.  The skin-tone of the legs is because of tights, not Photoshopping.

Bra cups can even be virtualized.  The technique called tompe-l'œil (from the French and literally “trick the eye” describes an optical illusion created by rendering on a two-dimensional surface something which appears as a three-dimensional object and the trick had been around for millennia when first the term was used in 1800 by French artist Louis-Léopold Boilly (1761-1845) for a painting he exhibited in the Paris Salon.  While it wasn’t for a few decades trompe-l'œil (usually in English as trompe l'oeil) was accepted by the academy as a legitimate part of high-art, architects and interior decorators continued to exploit the possibilities and the term entered their lexicons.  It has of course for years also been used in the prints on T-shirts but of late this has extended to depictions of underwear.  For most of the twentieth century, the sight of an exposed bra strap was a social faux pas, Vogue and other dictators of fashion publishing helpful tips recommending (for the well-organized) sewing on Velcro strips and (for everyone else) the industry’s DLR (device of last resort): the safety pin.  By the 1980s things had changed and the bra emerged as a fashion piece which might in part (or even in whole) be displayed.  It’s a look which waxes and wanes in popularity but one which has never gone away although it’s one of those things where ageism remains acceptable: beyond a certain age, it shouldn’t be used.  Now, fashion houses are promoting trompe l'oeil bras, knickers and other underwear printed on T-shirts, one attraction being it’s possible to create depictions of garments appearing to possess an intricacy or delicacy either not financially viable or impossible IRL (in real life).

A mastectomy bra with prostheses (left) and with the prostheses inserted in the cups' pockets (centre & right).

There are also bras for those who have lost a breast, the cups of which are “double-skinned” in that they feature internal “pockets” into which a prosthetic breast form (a prosthesis) can be inserted.  Those who have had a unilateral (or single) mastectomy (the surgical amputation of one breast) can choose a cup size to match the remaining while those who have lost both (a bilateral or double mastectomy) can adopt whatever size they prefer.  There are now even single cup bras for those who have lost one breast but opt not to use a prosthetic, an approach which reflects both an aesthetic choice and a reaction against what is described in the US as the “medical-industrial complex”, the point being that women who have undergone a mastectomy should not be subject to pressure either to use a prosthetic or agree to surgical reconstruction (a lucrative procedure for the industry).  This has now emerged as a form of advocacy called the “going flat” movement which has a focus not only on available fashions but also the need for a protocol under which, if women request an AFC (aesthetic flat closure, a surgical closure (sewing up) in which the “surplus” skin (often preserved to accommodate a future reconstructive procedure) is removed and the chest rendered essentially “flat”), that is what must be provided.  The medical industry has argued the AFC can preclude a satisfactory cosmetic outcome in reconstruction if a woman “changes her mind”  but the movement insists it's an example of how the “informed consent” of women is not being respected.  Essentially, what the movement seems to be arguing is the request for an AFC should be understood as an example of the legal principle of VAR (voluntary assumption of risk).  The attitude of surgeons who decline to perform an AFC is described by the movement as the “flat refusal”.