Reviewed
42G (UK 42F) bra size
A 42G has a 42-inch band and a G cup, about 7 inches between band and bust. In the UK it is 42F, in Australia 20F and in Europe 95G.
- US
- 42G
- UK
- 42F
- AU
- 20F
- EU
- 95G
- FR
- 110G
Also fits (sister sizes): 40H firmer band · 44DDD looser band · all same-volume sizes ↓
42G measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 49 in · 123–126 cm
- Cup difference
- 7 in (G 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.
42G sister sizes
Same cup volume, different band. If a 42G 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 42G doesn't fit
- Band rides up at the back
- Try 40H
- Band digs in, cups fit
- Try 44DDD
- Spilling over the cups
- Try 42H
- Cups gape or wrinkle
- Try 42DDD
Not sure what's wrong? Run through the 4-point fit check.
42G questions
What is the sister size of 42G?
40H (one band down, one cup up) and 44DDD (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42G in UK, Australian and European sizes?
UK 42F, Australia 20F, Europe 95G and France 110G. US and UK cup letters match up to DD and then split.
What measurements are a 42G?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 49 in (123–126 cm). Measure with the tape level and use the calculator for an exact result.
Is 42G a big size?
42G has a very full cup volume for a 42 band. Cup letters only mean something next to the band: a 42G holds the same as 28N or 30M.