Reviewed
40C vs 38D
40C and 38D are sister sizes: the cups hold the same volume. 40C has the looser band and 38D the firmer one, so pick by how the band feels.
Side by side
| 40C | 38D | |
|---|---|---|
| Relationship | Sister sizes | |
| UK | 40C | 38D |
| AU | 18C | 16D |
| EU | 90C | 85D |
| FR | 105C | 100D |
| Underbust | 40–41 in | 38–39 in |
| Bust | ≈ 43 in | ≈ 42 in |
| Cup volume | Same | |
On the size chart
40C is marked in ink and 38D is outlined. The yellow diagonal through 40C 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 40C the same as 38D?
40C and 38D are sister sizes: the cups hold the same volume. 40C has the looser band and 38D the firmer one, so pick by how the band feels.
Can I wear 38D if I'm a 40C?
Often, yes. The cups hold the same volume, so the change you'll feel is the band: 38D is firmer. Choose by how the band sits, level and snug on the loosest hook.
What are 40C and 38D in UK sizes?
40C is UK 40C and 38D is UK 38D. In Europe they are 90C and 85D.