Bra Size Converter
US · UK · EU · France · Japan · Korea band/cup
Convert your bra size
Bands are measured in inches in the US and UK (30, 32, 34...) and in centimetres in the EU, Korea and Japan (65, 70, 75...). Cups match up to D, then diverge: EU E = US DD = UK DD. Brands vary, so treat this as a starting point.
Band conversion
| EU/Korea(cm) | US/UK(inch) | FR | JP |
|---|---|---|---|
| 65 (KR/EU) | 30 | 80 | 65 |
| 70 (KR/EU) | 32 | 85 | 70 |
| 75 (KR/EU) | 34 | 90 | 75 |
| 80 (KR/EU) | 36 | 95 | 80 |
| 85 (KR/EU) | 38 | 100 | 85 |
| 90 (KR/EU) | 40 | 105 | 90 |
| 95 (KR/EU) | 42 | 110 | 95 |
Cup conversion
| EU/Korea | US | UK |
|---|---|---|
| AA | AA | AA |
| A | A | A |
| B | B | B |
| C | C | C |
| D | D | D |
| E | DD | DD |
| F | DDD | E |
| G | DDDD | F |
| H | 5D | FF |
FAQ
What is Korean 75B in US?
Band 75cm = US 34 and cup B stays B, so US 34B.
Why do cups differ by country?
A-D are common; above that they diverge, e.g. EU E=US DD=UK DD, EU F=US DDD=UK E.
What is US 34B in Korean or EU sizing?
The band converts from inches to centimetres, so US 34 is 75 in Korea and the EU. The cup stays the same up to D, which makes US 34B equal to 75B.
I am a US 36DD. What do I ask for in Korea?
Band 36 becomes 80 and a US DD cup is written as E on the Korean and European scale, so you would ask for 80E.
Why is my UK size different from my US size?
Bands are identical in both systems. Only the larger cups differ: US DDD is UK E, US DDDD is UK F, and so on. Below D the two systems match exactly.
How do I measure my own band and cup?
Measure snugly around your ribcage just under the bust for the band, then around the fullest part of the bust for the cup. The difference between the two gives the cup: about 2.5 cm (1 inch) per letter, so a 12.5 cm difference is roughly a D.
Do Japanese sizes work the same as Korean ones?
Yes. Japan and Korea both use centimetre bands and the same cup letters, so a Korean 75B is a Japanese 75B. Japanese brands do tend to run slightly smaller in the cup, so try one size up if you are between sizes.
Are these conversions exact?
They follow the standard band and cup tables, but every brand cuts differently and sister sizing means a 34B and a 32C hold a similar volume. If a brand publishes its own chart, that chart wins.