Reviewed
42A bra size
A 42A has a 42-inch band and a A cup, about 1 inches between band and bust. In the UK it is 42A, in Australia 20A and in Europe 95A.
- US
- 42A
- UK
- 42A
- AU
- 20A
- EU
- 95A
- FR
- 110A
Also fits (sister sizes): 40B firmer band · 44AA looser band · all same-volume sizes ↓
42A measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 43 in · 108–110 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.
42A sister sizes
Same cup volume, different band. If a 42A 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 42A doesn't fit
Not sure what's wrong? Run through the 4-point fit check.
42A questions
What is the sister size of 42A?
40B (one band down, one cup up) and 44AA (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42A in UK, Australian and European sizes?
UK 42A, Australia 20A, Europe 95A and France 110A. US and UK cup letters match up to DD and then split.
What measurements are a 42A?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 43 in (108–110 cm). Measure with the tape level and use the calculator for an exact result.
Is 42A a big size?
42A has a fuller cup volume for a 42 band. Cup letters only mean something next to the band: a 42A holds the same as 28H or 30G.