34F Bra Size, Fully Explained
Also written 34G: 34F is the UK label and 34G the US one. Same cup, same volume, different ladder.
34F 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.
34F in every sizing system
| US | UK | EU | FR | AU | JP | KR |
|---|---|---|---|---|---|---|
| 34G | 34F | 75G | 90G | 12F | H75 | H75 |
Sister sizes of 34F
Each sister holds roughly the volume of 34F on a different band. Band riding up in a 34F? Try 32H. Band digging painfully? The other direction.
How 34F compares, visually
Circle areas scale with estimated cup volume: 34F ≈ 2261 cc per cup, roughly 2.0 kg of tissue per side at typical density. Model documented on the weight page.
Is 34F big?
Is 34F big? By chart position yes, it sits in the fuller third, though on a 34 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 34F
Confirm the size first: two minutes with the calculator beats inheriting a label. Then let the brand decoder translate 34F 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 34F passes the band checks but the cup misbehaves, that is usually shape, not size.
Frequently asked questions
Last updated August 2026.