Reviewed
38J (UK 38GG) bra size
A 38J has a 38-inch band and a J cup, about 10 inches between band and bust. In the UK it is 38GG, in Australia 16GG and in Europe 85J.
- US
- 38J
- UK
- 38GG
- AU
- 16GG
- EU
- 85J
- FR
- 100J
Also fits (sister sizes): 36K firmer band · 40I looser band · all same-volume sizes ↓
38J measurements
- Snug underbust
- 38–39 in · 97–99 cm
- Bust, fullest part
- about 48 in · 121–123 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.
38J sister sizes
Same cup volume, different band. If a 38J 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 38J doesn't fit
- Band rides up at the back
- Try 36K
- Band digs in, cups fit
- Try 40I
- Spilling over the cups
- Try 38K
- Cups gape or wrinkle
- Try 38I
Not sure what's wrong? Run through the 4-point fit check.
38J questions
What is the sister size of 38J?
36K (one band down, one cup up) and 40I (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 38J in UK, Australian and European sizes?
UK 38GG, Australia 16GG, Europe 85J and France 100J. US and UK cup letters match up to DD and then split.
What measurements are a 38J?
A snug underbust of about 38–39 in (97–99 cm) and a bust of about 48 in (121–123 cm). Measure with the tape level and use the calculator for an exact result.
Is 38J a big size?
38J has a very full cup volume for a 38 band. Cup letters only mean something next to the band: a 38J holds the same as 28O or 30N.