knowhersize

Reviewed

34D vs 36D

36D is bigger than 34D. The cup letter is the same, but cup volume grows with the band, so 36D's cups hold more as well as having the longer band.

Side by side

34D36D
RelationshipSame cup letter, different band
UK34D36D
AU12D14D
EU75D80D
FR90D95D
Underbust34–35 in36–37 in
Bust≈ 38 in≈ 40 in
Cup volume36D holds more

On the size chart

34D is marked in ink and 36D is outlined. The yellow diagonal through 34D shows every size with the same cup volume.

34D = UK 34D · AU 12D · EU 75D · FR 90D. Sister sizes: 32DD, 36C. 34D in full →
A
B
C
D
DD
DDD
G
H
28
30
32
34
36
38
40
42
44

Questions

Is 34D or 36D bigger?

36D is bigger than 34D. The cup letter is the same, but cup volume grows with the band, so 36D's cups hold more as well as having the longer band.

Can I wear 36D if I'm a 34D?

Only if the fit check says so. Changing the band also changes the cup volume, so try both where returns are easy.

What are 34D and 36D in UK sizes?

34D is UK 34D and 36D is UK 36D. In Europe they are 75D and 80D.