Reviewed
40B vs 38C
40B and 38C are sister sizes: the cups hold the same volume. 40B has the looser band and 38C the firmer one, so pick by how the band feels.
Side by side
| 40B | 38C | |
|---|---|---|
| Relationship | Sister sizes | |
| UK | 40B | 38C |
| AU | 18B | 16C |
| EU | 90B | 85C |
| FR | 105B | 100C |
| Underbust | 40–41 in | 38–39 in |
| Bust | ≈ 42 in | ≈ 41 in |
| Cup volume | Same | |
On the size chart
40B is marked in ink and 38C is outlined. The yellow diagonal through 40B 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
Questions
Is 40B the same as 38C?
40B and 38C are sister sizes: the cups hold the same volume. 40B has the looser band and 38C the firmer one, so pick by how the band feels.
Can I wear 38C if I'm a 40B?
Often, yes. The cups hold the same volume, so the change you'll feel is the band: 38C is firmer. Choose by how the band sits, level and snug on the loosest hook.
What are 40B and 38C in UK sizes?
40B is UK 40B and 38C is UK 38C. In Europe they are 90B and 85C.