Bra cup sizes
Bra cup sizes label the difference between your bust and band, starting at AA and continuing through H, with the letters after the early steps varying by sizing system.
Cup letters by system
Each cell shows the difference between bust and band, in inches, where a system writes that letter.
| Cup | US | UK | EU | FR/BE | AU/NZ | JP |
|---|---|---|---|---|---|---|
| AA | 0 in | 0 in | 0 in | 0 in | 0 in | Not used |
| A | 1 in | 1 in | 1 in | 1 in | 1 in | Not used |
| B | 2 in | 2 in | 2 in | 2 in | 2 in | Not used |
| C | 3 in | 3 in | 3 in | 3 in | 3 in | 2 in |
| D | 4 in | 4 in | 4 in | 4 in | 4 in | 3 in |
| DD | 5 in | 5 in | Not used | Not used | 5 in | Not used |
| E | 5 in | 6 in | 5 in | 5 in | 6 in | 4 in |
| F | 6 in | 7 in | 6 in | 6 in | 7 in | 5 in |
| G | 7 in | 9 in | 7 in | 7 in | 8 in | 6 in |
| H | 8 in | 11 in | 8 in | 8 in | 9 in | 7 in |
Cup size pages
One page for each of the 10 letters from AA to H.
- AA cup size
AA opens the cup-letter sequence in five systems, with A next. Its inch difference is shared, while EU expresses it in centimetres.
- A cup size
Your A is the first full step above AA, a single inch of difference. JP leaves this letter out of its chart.
- B cup size
B is shown in five systems, with A before it and C after it; the Japanese chart leaves it out. Its EU method range is given in centimetres.
- C cup size
A cup C is 3 in in most systems, while JP prints D at that step and gives its C only 2 in.
- D cup size
Cup D equals 4 in on most tags, but JP shows E at that step and keeps D for 3 in.
- DD cup size
A comparison of cup letters shows where DD appears, which letters surround it, and how its inch and centimetre figures are presented across systems.
- E cup size
The letter E reads 5 in, 6 in or 4 in depending on the tag, and a US tag shares it with DD.
- F cup size
Cup F has three readings by system: 6 in, 7 in and 5 in. US tags print it as DDD/F.
- G cup size
G is assigned different bust-to-band differences across systems. Its neighbouring letters, EU centimetre interval, and listed bust ranges also depend on the system.
- H cup size
H has system-specific numerical values and neighbouring letters; the listed sequences place it after G or GG and before I or HH.
US, UK, EU, FR/BE and AU/NZ charts use the same cup letters for differences from 0 to 4 in. At 5 in, they split: US prints DD/E, UK and AU/NZ print DD, EU and FR/BE print E, and JP prints F.
The sequences continue differently after that point. At 6 in, US prints DDD/F, UK and AU/NZ print E, EU and FR/BE print F, and JP prints G. US charts pair some labels, including DD/E at 5 in, DDD/F at 6 in and DDDD/G at 7 in. UK tags place double letters between single ones, including DD, FF, GG, HH and JJ.
The charts list cup letters at 16 differences for US, UK, EU, FR/BE and AU/NZ, and at 9 differences for JP. The JP column lists letters only for differences from 2 to 10 in, and JP cup letters vary by brand. Published charts disagree on AU/NZ at 8 in, with some showing G and another showing FF; at 10 in, some show I and another shows GG.
The EU method defines cup letters in centimetres, while published charts also print EU letters against differences in inches, and the scales do not line up. One inch is 2.54 cm.