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42D bra size — conversions, sister sizes & fit
A 42D fits an underbust of about 92.5–97.5 cm with a bust 16.25–18.75 cm larger than the band. Here is everything that label actually means — and how to check it really fits you.
Your bra size
42D US
Which measurements give 42D?
| cm | |
|---|---|
| Underbust (snug) | 92.5–97.5 |
| Bust (fullest point) | 108.75–116.25 |
| Difference (cup volume) | 16.25–18.75 |
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 42D
40DD and 44C hold a similar cup volume to 42D with a tighter or looser band. If the band of a 42D rides up, try 40DD; if it digs in, try 44C.
Larger bands are widely produced, but the stretch of the band matters more than anywhere else in the range: fabrics that measure right but stretch loose can lose their support over time. Fasten a new bra on the loosest hook and expect to tighten over its life. Cups on large bands are often cut shallow — if you get gaping with a correct band, try one cup down before changing band.
42D in the Cherry Size catalogue In the Cherry Size catalogue, 282 of 617 brands have a recorded size range that includes 42D. That count uses each brand's band range and largest cup (the smallest cup is not recorded) and includes ranges not yet checked. Each of them cuts it differently: the app estimates the size to try at each brand, from your own measurements.In the app, your size is free, and so is your size at 3 brands you choose. Every brand, the fitting room, the wardrobe and the journal need a subscription, with a free trial for eligible new subscribers.
See 42D brand by brand42D in questions
What is 42D in European sizing?
A 42D corresponds to 95D in European sizing and 110D in French/Spanish sizing, by the usual correspondences. The conversion changes the band numbering, and from DD up the cup letter too (US DD = EU E); individual brands can differ.
Is 42D big or small?
It is a larger band size, found in many brands' extended ranges. Cup letters mean nothing alone: a cup only has a volume relative to its band, which is why 40DD and 44C hold a similar volume to 42D.
My 42D doesn't fit — what should I try?
If the band rides up or feels loose, go to 40DD. If the band digs in while the cup is fine, go to 44C. If the cup overflows, try one cup up in the same band; if it wrinkles empty, one cup down. Two minutes with the calculator gives you a fresh estimate.
Nearby sizes
Your size, everywhere you shop
Cherry Size keeps your measurements on your iPhone, translates them into 617 brands, tracks changes through pregnancy, nursing or weight shifts (with a subscription) — and never uploads a thing. In the app, your size is free, and so is your size at 3 brands you choose. Every brand, the fitting room, the wardrobe and the journal need a subscription, with a free trial for eligible new subscribers.
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