Bra size guide and converter

Below you will find an international bra size converter. The first chart is used for converting band sizes, and the second for cup sizes. We have also created a bra sizing guide to help you find your correct US size.

Note: These bra chart sizes are only guides, and are meant to be taken as estimates. Specific manufacturers or brands may have their own systems of measurement.

Cup Size Conversions

Band Size Conversions

Note: Japanese bra sizes are the same as European sizes, but the cup sizes are often written first (i.e., C75 instead of 75C).

To find your correct bra size, measure around your body (just underneath your breasts). The measuring tape should be both horizontal and quite snug. The measurement is your band size (in inches). If it’s an odd number (i.e., 31) then your correct size could be either 30 or 32.

To find your correct cup size, measure around the fullest part of your breasts. Take this bust measurement and subtract your band measurement (i.e., if you measure 31 underneath your breasts and 34 around, the result is 34-31, which equals 3). Use the result to find your cup size below:

Cup size = Bust size – Band size:

0 = AA
<1 = A
1 = B
2 = C
3 = D
4 = DD
5 = DDD/E
6 = F
7 = G
8 = H