Cherry SizeCalculator › All bra sizes, size by size › 38DDD
38DDD bra size — conversions, sister sizes & fit
A 38DDD fits an underbust of about 83–87 cm with a bust 21–24 cm larger than the band. Here is everything that label actually means — and how to check it really fits you.
Your bra size
38DDD US
Which measurements give 38DDD?
| cm | |
|---|---|
| Underbust (snug) | 83–87 |
| Bust (fullest point) | 104–111 |
| Difference (cup volume) | 21–24 |
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 38DDD
36DDDD and 40DD hold the same cup volume as 38DDD with a tighter or looser band. If the band of a 38DDD rides up, try 36DDDD; if it digs in, try 40DD.
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 38DDD? 264 of the 632 brands in the Cherry Size catalogue are confirmed to carry 38DDD 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 38DDD brand by brand38DDD in questions
What is 38DDD in European sizing?
A 38DDD corresponds to 85F in European sizing and 100F in French/Spanish sizing. The cup volume is identical — only the band numbering changes between systems.
Is 38DDD 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 36DDDD and 40DD hold exactly the same volume as 38DDD.
My 38DDD doesn't fit — what should I try?
If the band rides up or feels loose, go to 36DDDD. If the band digs in while the cup is fine, go to 40DD. 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
Your size, everywhere you shop
Cherry Size keeps your measurements on your iPhone, translates them into 632 brands, tracks changes through pregnancy, nursing or weight shifts — and never uploads a thing.
Download on the App Store