Reviewed
34J (UK 34GG) bra size
A 34J has a 34-inch band and a J cup, about 10 inches between band and bust. In the UK it is 34GG, in Australia 12GG and in Europe 75J.
- US
- 34J
- UK
- 34GG
- AU
- 12GG
- EU
- 75J
- FR
- 90J
Also fits (sister sizes): 32K firmer band · 36I looser band · all same-volume sizes ↓
34J measurements
- Snug underbust
- 34–35 in · 86–89 cm
- Bust, fullest part
- about 44 in · 110–113 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.
34J sister sizes
Same cup volume, different band. If a 34J 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 34J doesn't fit
- Band rides up at the back
- Try 32K
- Band digs in, cups fit
- Try 36I
- Spilling over the cups
- Try 34K
- Cups gape or wrinkle
- Try 34I
Not sure what's wrong? Run through the 4-point fit check.
34J questions
What is the sister size of 34J?
32K (one band down, one cup up) and 36I (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 34J in UK, Australian and European sizes?
UK 34GG, Australia 12GG, Europe 75J and France 90J. US and UK cup letters match up to DD and then split.
What measurements are a 34J?
A snug underbust of about 34–35 in (86–89 cm) and a bust of about 44 in (110–113 cm). Measure with the tape level and use the calculator for an exact result.
Is 34J a big size?
34J has a very full cup volume for a 34 band. Cup letters only mean something next to the band: a 34J holds the same as 28M or 30L.