28A Bra Size, Fully Explained
28A sits in the petite-band, smaller-cup corner of the chart: a narrow ribcage with a modest bust-to-band difference. It is a common size that mall ranges serve reasonably well, though the smallest bands sell out first and fit best from brands that actually cut a true 28 band rather than labeling a stretchy 30.
28A in every sizing system
| US | UK | EU | FR | AU | JP | KR |
|---|---|---|---|---|---|---|
| 28A | 28A | 60A | 75A | 6A | B60 | B60 |
Sister sizes of 28A
Each sister holds roughly the volume of 28A on a different band. Band riding up in a 28A? Try 30AA. Band digging painfully? The other direction.
How 28A compares, visually
Circle areas scale with estimated cup volume: 28A ≈ 38 cc per cup, roughly 0.0 kg of tissue per side at typical density. Model documented on the weight page.
Is 28A big?
Is 28A big? In absolute terms it is on the smaller side of the chart, but the honest answer is that the question is mostly noise: the letter only means something relative to the 28 band, and bodies wear the same volume completely differently. What matters is that 28A fits its wearer, which the fit checks decide better than comparison ever will.
Shopping notes for 28A
Confirm the size first: two minutes with the calculator beats inheriting a label. Then let the brand decoder translate 28A into each brand's cut, since the same tag runs shallow at mall brands and deep at UK houses. If 28A passes the band checks but the cup misbehaves, that is usually shape, not size.
Frequently asked questions
Last updated August 2026.