(1 inch = 2.54 cm.)īe careful of alternative sizing. US and UK cup sizes are divided in steps of 1 inch, JP and KO in steps of 2.5 cm (almost but not exactly 1 inch), while the rest in steps of 2 cm. However, we must round down 74 to 70, so the difference is calculated as 85-70=15 cm.
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For example: For measurements over bust 85 cm and under bust 74 cm the difference would seem to be 11 cm. If the under bust measurement it rounded down, then always base the difference calculation on this rounded number. For example: Over bust 85 cm and under bust 70 cm gives the difference of 15 cm, which gives an European B-cup. Bra Cup Size ConversionsĬup sizes are determined by calculating the difference between over bust (where the bust is the fullest) and under bust measurements. Measurements in centimeters and inches, and corresponding band sizes. Table: International bra band sizes and approximative conversions. International Bra Band Sizes and Conversions Under Bust See additional notes for more similarities and differences between the sizing conventions. Most bra conversion tables ignore or assume that the conventions fit perfectly together making them highly inaccurate. Approximations are necessary, especially for bra cups. 1 inch equals 2.54 cm, and as a result, the size conversions do not fit together well. US and UK sizes are based on inches, the rest on centimeters. This mean, for example, that an EU A-cup and an US A-cup are not the same. The numbers and letters often mean different things depending on the convention, even if the measurements are identical. The order of these three parts can vary, for example: "US 32D", "D75 EU" and "AU 10C". Sizes consist of three parts: the convention abbreviation a number, representing the band size and a letter, representing the cup size. Image: Bra tag with various size conventions. Product tags usually show sizes in several conventions.
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The conventions are named after their area of origin and almost always as an abbreviation (shown in parenthesis): American (US), British (UK), European (EU), International (Int), French (FR), Spanish (ES), Belgian (BE), Italian (IT), Australian (AU), New Zealander (NZ), Japanese (JP) and South Korean (KO).įor specific details and differences, click a convention name above.ĮU and Int are identical but with alternative names. Several bra sizing conventions are used across the world, also referred to as "size charts" or "size tables".