Reviewed
42C bra size
A 42C has a 42-inch band and a C cup, about 3 inches between band and bust. In the UK it is 42C, in Australia 20C and in Europe 95C.
- US
- 42C
- UK
- 42C
- AU
- 20C
- EU
- 95C
- FR
- 110C
Also fits (sister sizes): 40D firmer band · 44B looser band · all same-volume sizes ↓
42C measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 45 in · 113–116 cm
- Cup difference
- 3 in (C 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.
42C sister sizes
Same cup volume, different band. If a 42C 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 42C doesn't fit
- Band rides up at the back
- Try 40D
- Band digs in, cups fit
- Try 44B
- Spilling over the cups
- Try 42D
- Cups gape or wrinkle
- Try 42B
Not sure what's wrong? Run through the 4-point fit check.
42C questions
What is the sister size of 42C?
40D (one band down, one cup up) and 44B (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42C in UK, Australian and European sizes?
UK 42C, Australia 20C, Europe 95C and France 110C. US and UK cup letters match up to DD and then split.
What measurements are a 42C?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 45 in (113–116 cm). Measure with the tape level and use the calculator for an exact result.
Is 42C a big size?
42C has a very full cup volume for a 42 band. Cup letters only mean something next to the band: a 42C holds the same as 28J or 30I.