Reviewed
38DDD vs 40DDD
40DDD is bigger than 38DDD. The cup letter is the same, but cup volume grows with the band, so 40DDD's cups hold more as well as having the longer band.
Side by side
| 38DDD | 40DDD | |
|---|---|---|
| Relationship | Same cup letter, different band | |
| UK | 38E | 40E |
| AU | 16E | 18E |
| EU | 85F | 90F |
| FR | 100F | 105F |
| Underbust | 38–39 in | 40–41 in |
| Bust | ≈ 44 in | ≈ 46 in |
| Cup volume | 40DDD holds more | |
On the size chart
38DDD is marked in ink and 40DDD is outlined. The yellow diagonal through 38DDD 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 38DDD or 40DDD bigger?
40DDD is bigger than 38DDD. The cup letter is the same, but cup volume grows with the band, so 40DDD's cups hold more as well as having the longer band.
Can I wear 40DDD if I'm a 38DDD?
Only if the fit check says so. Changing the band also changes the cup volume, so try both where returns are easy.
What are 38DDD and 40DDD in UK sizes?
38DDD is UK 38E and 40DDD is UK 40E. In Europe they are 85F and 90F.