28B Bra Size, Fully Explained
28B 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.
28B in every sizing system
| US | UK | EU | FR | AU | JP | KR |
|---|---|---|---|---|---|---|
| 28B | 28B | 60B | 75B | 6B | C60 | C60 |
Sister sizes of 28B
Each sister holds roughly the volume of 28B on a different band. Band riding up in a 28B? Try 30A. Band digging painfully? The other direction.
How 28B compares, visually
Circle areas scale with estimated cup volume: 28B ≈ 152 cc per cup, roughly 0.1 kg of tissue per side at typical density. Model documented on the weight page.
Is 28B big?
Is 28B 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 28B fits its wearer, which the fit checks decide better than comparison ever will.
Shopping notes for 28B
Confirm the size first: two minutes with the calculator beats inheriting a label. Then let the brand decoder translate 28B into each brand's cut, since the same tag runs shallow at mall brands and deep at UK houses. If 28B passes the band checks but the cup misbehaves, that is usually shape, not size.
Frequently asked questions
Last updated August 2026.