Reviewed
42J (UK 42GG) bra size
A 42J has a 42-inch band and a J cup, about 10 inches between band and bust. In the UK it is 42GG, in Australia 20GG and in Europe 95J.
- US
- 42J
- UK
- 42GG
- AU
- 20GG
- EU
- 95J
- FR
- 110J
Also fits (sister sizes): 40K firmer band · 44I looser band · all same-volume sizes ↓
42J measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 52 in · 131–133 cm
- Cup difference
- 10 in (J 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.
42J sister sizes
Same cup volume, different band. If a 42J 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 42J doesn't fit
- Band rides up at the back
- Try 40K
- Band digs in, cups fit
- Try 44I
- Spilling over the cups
- Try 42K
- Cups gape or wrinkle
- Try 42I
Not sure what's wrong? Run through the 4-point fit check.
42J questions
What is the sister size of 42J?
40K (one band down, one cup up) and 44I (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42J in UK, Australian and European sizes?
UK 42GG, Australia 20GG, Europe 95J and France 110J. US and UK cup letters match up to DD and then split.
What measurements are a 42J?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 52 in (131–133 cm). Measure with the tape level and use the calculator for an exact result.
Is 42J a big size?
42J has a very full cup volume for a 42 band. Cup letters only mean something next to the band: a 42J holds the same as 32O or 34N.