Bra Size Guide
Bra size guide and converter
Below you will find a bra size converter, to convert to international sizes. The first chart converts the band size, and the second converts the cup size. You will also find a bra sizing guide, to find your correct US size.
Please note that these conversion table only give an estimate to your bra size, as sizes may vary between different bra manufacturers.
Convert cup size
Use this table to convert your cup size into international sizes.
Convert band size
Use this table to convert your bra band size into international sizes.
Japanese bra sizes are the same as European sizes, but the cup size are often written first, e.g. C75 instead of 75C.
Find the right bra size
To find your band size, measure around your body, just underneath your breasts. The measuring tape should be horizontal, and quite snug. The measurement in inches is your band size. If it’s an odd number, e.g. 31, your correct size could be both 30 and 32.
To find your cup size, measure around the fullest part of your breasts. Take this bust measurement and subtract the band measurement, e.g. if you measure 31 underneath your breasts, and 34 around, the result is 34-31 = 3. Use the result to find your cup size here:
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