38DDD Bra Size, Fully Explained
38DDD is a mid-band, full-cup size, right where US labels get confusing (DD, DDD) and UK letters (E, F, FF) do a better job. Mainstream ranges reach it inconsistently; full-bust brands cut it as a core size with the deeper wires and firmer bands the volume actually needs.
38DDD in every sizing system
| US | UK | EU | FR | AU | JP | KR |
|---|---|---|---|---|---|---|
| 38DDD | 38E | 85F | 100F | 16E | G85 | G85 |
Sister sizes of 38DDD
Each sister holds roughly the volume of 38DDD on a different band. Band riding up in a 38DDD? Try 36G. Band digging painfully? The other direction.
How 38DDD compares, visually
Circle areas scale with estimated cup volume: 38DDD ≈ 1857 cc per cup, roughly 1.7 kg of tissue per side at typical density. Model documented on the weight page.
Is 38DDD big?
Is 38DDD big? By chart position yes, it sits in the fuller third, though on a 38 band the projection reads differently than the same letter would on a wider frame. More usefully: this is the range where band quality and cup engineering decide daily comfort, which deserves the attention the "is it big" question usually absorbs.
Shopping notes for 38DDD
Confirm the size first: two minutes with the calculator beats inheriting a label. Then let the brand decoder translate 38DDD into each brand's cut, since the same tag runs shallow at mall brands and deep at UK houses, where this size is core range rather than an afterthought. If 38DDD passes the band checks but the cup misbehaves, that is usually shape, not size.
Frequently asked questions
Last updated August 2026.