28C Bra Size, Fully Explained
28C combines a narrow 28 ribcage with a solid few inches of difference, which makes it one of the most misunderstood sizes: on a small frame this cup reads fuller than the letter suggests. Many lifelong "30B" wearers are actually a 28C whose band was never tried small enough.
28C in every sizing system
| US | UK | EU | FR | AU | JP | KR |
|---|---|---|---|---|---|---|
| 28C | 28C | 60C | 75C | 6C | D60 | D60 |
Sister sizes of 28C
Each sister holds roughly the volume of 28C on a different band. Band riding up in a 28C? Try 30B. Band digging painfully? The other direction.
How 28C compares, visually
Circle areas scale with estimated cup volume: 28C ≈ 342 cc per cup, roughly 0.3 kg of tissue per side at typical density. Model documented on the weight page.
Is 28C big?
Is 28C big? It is close to the middle of the real-world distribution: commonly reported averages in the US and UK land within a letter of this size, though survey methods vary widely. On a 28 band this difference is proportionate rather than dramatic, whatever cup-letter folklore suggests.
Shopping notes for 28C
Confirm the size first: two minutes with the calculator beats inheriting a label. Then let the brand decoder translate 28C into each brand's cut, since the same tag runs shallow at mall brands and deep at UK houses. If 28C passes the band checks but the cup misbehaves, that is usually shape, not size.
Frequently asked questions
Last updated August 2026.