Reviewed
40D vs 38DD
40D and 38DD are sister sizes: the cups hold the same volume. 40D has the looser band and 38DD the firmer one, so pick by how the band feels.
Side by side
| 40D | 38DD | |
|---|---|---|
| Relationship | Sister sizes | |
| UK | 40D | 38DD |
| AU | 18D | 16DD |
| EU | 90D | 85E |
| FR | 105D | 100E |
| Underbust | 40–41 in | 38–39 in |
| Bust | ≈ 44 in | ≈ 43 in |
| Cup volume | Same | |
On the size chart
40D is marked in ink and 38DD is outlined. The yellow diagonal through 40D 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 40D the same as 38DD?
40D and 38DD are sister sizes: the cups hold the same volume. 40D has the looser band and 38DD the firmer one, so pick by how the band feels.
Can I wear 38DD if I'm a 40D?
Often, yes. The cups hold the same volume, so the change you'll feel is the band: 38DD is firmer. Choose by how the band sits, level and snug on the loosest hook.
What are 40D and 38DD in UK sizes?
40D is UK 40D and 38DD is UK 38DD. In Europe they are 90D and 85E.