Reviewed
30A vs 30B
30B is bigger than 30A. Same band, and 30B has the larger cup letter, so it holds more.
Side by side
| 30A | 30B | |
|---|---|---|
| Relationship | Same band, different cup | |
| UK | 30A | 30B |
| AU | 8A | 8B |
| EU | 65A | 65B |
| FR | 80A | 80B |
| Underbust | 30–31 in | 30–31 in |
| Bust | ≈ 31 in | ≈ 32 in |
| Cup volume | 30B holds more | |
On the size chart
30A is marked in ink and 30B is outlined. The yellow diagonal through 30A shows every size with the same cup volume.
A
B
C
D
DD
DDD
G
H
28
30
32
34
36
38
40
42
44
Read each size
Other comparisons
Questions
Is 30A or 30B bigger?
30B is bigger than 30A. Same band, and 30B has the larger cup letter, so it holds more.
Can I wear 30B if I'm a 30A?
Only if the fit check says so. A different cup letter on the same band changes the cup volume, so try both where returns are easy.
What are 30A and 30B in UK sizes?
30A is UK 30A and 30B is UK 30B. In Europe they are 65A and 65B.