Reviewed
30A bra size
A 30A has a 30-inch band and a A cup, about 1 inches between band and bust. In the UK it is 30A, in Australia 8A and in Europe 65A.
- US
- 30A
- UK
- 30A
- AU
- 8A
- EU
- 65A
- FR
- 80A
Also fits (sister sizes): 28B firmer band · 32AA looser band · all same-volume sizes ↓
30A measurements
- Snug underbust
- 30–31 in · 76–79 cm
- Bust, fullest part
- about 31 in · 77–80 cm
- Cup difference
- 1 in (A cup)
These are starting points from the band-and-cup method. Brands differ by about a size, so a two-minute measurement beats any chart.
30A sister sizes
Same cup volume, different band. If a 30A band feels too loose, go down a band and up a cup; if it feels tight, go up a band and down a cup.
If a 30A doesn't fit
Not sure what's wrong? Run through the 4-point fit check.
Compare 30A
Sizes next to 30A
30A questions
What is the sister size of 30A?
28B (one band down, one cup up) and 32AA (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 30A in UK, Australian and European sizes?
UK 30A, Australia 8A, Europe 65A and France 80A. US and UK cup letters match up to DD and then split.
What measurements are a 30A?
A snug underbust of about 30–31 in (76–79 cm) and a bust of about 31 in (77–80 cm). Measure with the tape level and use the calculator for an exact result.
Is 30A a big size?
30A has a small cup volume for a 30 band. Cup letters only mean something next to the band: a 30A holds the same as 28B or 32AA.