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28DDD bra size — conversions, sister sizes & fit
A 28DDD fits an underbust of about 57.5–62.5 cm with a bust 21.25–23.75 cm larger than the band. Here is everything that label actually means — and how to check it really fits you.
Your bra size
28DDD US
Which measurements give 28DDD?
| cm | |
|---|---|
| Underbust (snug) | 57.5–62.5 |
| Bust (fullest point) | 78.75–86.25 |
| Difference (cup volume) | 21.25–23.75 |
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 28DDD
30DD holds a similar cup volume to 28DDD with a looser band: if the band of a 28DDD digs in, try 30DD. There is no smaller band in this chart, so if the band rides up, look for a brand whose range starts at a smaller band.
A small underbust with a deep cup is the profile the high street serves worst: mainstream ranges often stop at D or DD on small bands. Specialist full-bust brands build specifically for this shape, with narrower wires and deeper cups that don't gape at the top. Resist sister-sizing up in the band to find stock — on a small frame, band support is everything. The projected shapes of full-bust lines will fit better than a stretched mainstream cup.
28DDD in the Cherry Size catalogue In the Cherry Size catalogue, 44 of 617 brands have a recorded size range that includes 28DDD. 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 28DDD brand by brand28DDD in questions
What is 28DDD in European sizing?
A 28DDD corresponds to 60F in European sizing and 75F 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 28DDD big or small?
It is a full-bust size on a small frame — a combination mainstream brands often skip. Cup letters mean nothing alone: a cup only has a volume relative to its band, which is why 30DD holds a similar volume to 28DDD.
My 28DDD doesn't fit — what should I try?
If the band digs in while the cup is fine, go to 30DD. If the band rides up or feels loose, look for a brand whose range starts below this band. 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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