knowhersize

Reviewed

34DD vs 36DD

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

Side by side

34DD36DD
RelationshipSame cup letter, different band
UK34DD36DD
AU12DD14DD
EU75E80E
FR90E95E
Underbust34–35 in36–37 in
Bust≈ 39 in≈ 41 in
Cup volume36DD holds more

On the size chart

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

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

Questions

Is 34DD or 36DD bigger?

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

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

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

What are 34DD and 36DD in UK sizes?

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