Cherry SizeCalculator › All bra sizes, size by size › 34DD
34DD bra size — conversions, sister sizes & fit
A 34DD fits an underbust of about 73–77 cm with a bust 19–21 cm larger than the band. Here is everything that label actually means — and how to check it really fits you.
Your bra size
34DD US
Which measurements give 34DD?
| cm | |
|---|---|
| Underbust (snug) | 73–77 |
| Bust (fullest point) | 92–98 |
| Difference (cup volume) | 19–21 |
Between two sizes? Measurements near the edges of these ranges can also fit the neighbouring size — check the sister sizes below and, in doubt, trust the fit checks from our measuring guide.
Sister sizes of 34DD
32DDD and 36D hold the same cup volume as 34DD with a tighter or looser band. If the band of a 34DD rides up, try 32DDD; if it digs in, try 36D.
Deep cups on standard bands are well covered by full-bust specialists and increasingly by mainstream brands' extended ranges — but cut quality varies enormously. Prioritise firm bands (the band does 80% of the work, and that matters more with more weight to support), side support panels that keep tissue forward, and top edges that don't cut in. If straps dig, the band is almost always the real culprit.
Who makes 34DD? 340 of the 632 brands in the Cherry Size catalogue are confirmed to carry 34DD in their standard range. But each of them cuts it differently — the app tells you the exact size to try at every one of them, from your own measurements.
See 34DD brand by brand34DD in questions
What is 34DD in European sizing?
A 34DD corresponds to 75E in European sizing and 90E in French/Spanish sizing. The cup volume is identical — only the band numbering changes between systems.
Is 34DD big or small?
It is a full-bust size: a deep cup on a standard band, well served by specialist lines. Cup letters mean nothing alone: a cup only has a volume relative to its band, which is why 32DDD and 36D hold exactly the same volume as 34DD.
My 34DD doesn't fit — what should I try?
If the band rides up or feels loose, go to 32DDD. If the band digs in while the cup is fine, go to 36D. If the cup overflows, try one cup up in the same band; if it wrinkles empty, one cup down. Two minutes with the calculator confirms it.
Nearby sizes
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