Both variants are still widely used and this is why American cups are sometimes labeled showing both, for example 'E/DD' and 'F/DDD'.Ĭontrary to common belief, US and UK cup sizes are not identical. Today, American brands are transitioning to using E instead of DD, F instead of DDD etc. Traditionally, US used multiples of 'D' in the cup naming convention, for example, 'DD' and 'DDD' and many brands still do. You will not need to recalculate as in the example above. The size tables below are based on actual, precise measurements. When between two cup sizes, choose the larger one. 7 inches is between C and D-cup but cups should not squeeze your bust. A difference of 7 inches gives us a D-cup. The cup size is 39-32 = 7 (note that 32 is the rounded down measurement). Always calculate the difference to rounded down measurement.Ĭup calculation example: Having over bust 39 inches and under bust 33 inches, the 33 needs to be rounded down to 32. Due to demand, sizes smaller than A were introduced and are named AA (one size smaller than A) and AAA (two sizes smaller than A). The sizes continue alphabetically in steps of 1 inch with B (5-6 in), C (6-7 in) etc. Sizes start with A, which represent an over/under bust difference of 4-5 in. American band naming and measurements are identical with British (UK).Ĭup sizes refer to the difference between over bust and the rounded down under bust measurements. The most common band sizes are 32, 34, 36 and 38 which correspond to 70, 75, 80 and 85 in the European and International convention. Adding four gives us 30, which is the band size. For example, measurement 27 inches is rounded down to 26. To determine the band size, use the rounded down measurement and add four (+4). Always round down to the nearest multiple of 2 inches. However, the band measurement is usually done under bust, which is why the band size label and the band size measurements are not identical. Band size is a 'label' that refers to the measurement above bust.

Learn why most women choose too big band size and too small cups.Īmerican band sizes are divided in steps of 2 inches. If you are between two cup sizes, choose the bigger. If you are between two band sizes, choose the smaller. The number represents the bra band size and the letter the cup size.īands are measured tightly under bust, cups are measured loosely over the fullest part of the bust. Use size conversion charts to compare American (US) size with other conventions.īra sizes following the US sizing convention are based on measurements in inches.

The abbreviation is written together with the size, for example 'US 32D' or '32D (US)'. About US Sizing ConventionĪmerican sizes are abbreviated as US. Due to the large amount sizes, the tables are divided by cups. The sizing data is verified for accuracy and can be used as reference. US / American bra sizes are shown in inches and centimeters.

Us bra size calculator