Reviewed
38DD bra size
A 38DD has a 38-inch band and a DD cup, about 5 inches between band and bust. In the UK it is 38DD, in Australia 16DD and in Europe 85E.
- US
- 38DD
- UK
- 38DD
- AU
- 16DD
- EU
- 85E
- FR
- 100E
Also fits (sister sizes): 36DDD firmer band · 40D looser band · all same-volume sizes ↓
38DD measurements
- Snug underbust
- 38–39 in · 97–99 cm
- Bust, fullest part
- about 43 in · 108–110 cm
- Cup difference
- 5 in (DD 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.
38DD sister sizes
Same cup volume, different band. If a 38DD 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 38DD doesn't fit
- Band rides up at the back
- Try 36DDD
- Band digs in, cups fit
- Try 40D
- Spilling over the cups
- Try 38DDD
- Cups gape or wrinkle
- Try 38D
Not sure what's wrong? Run through the 4-point fit check.
Compare 38DD
Sizes next to 38DD
38DD questions
What is the sister size of 38DD?
36DDD (one band down, one cup up) and 40D (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 38DD in UK, Australian and European sizes?
UK 38DD, Australia 16DD, Europe 85E and France 100E. US and UK cup letters match up to DD and then split.
What measurements are a 38DD?
A snug underbust of about 38–39 in (97–99 cm) and a bust of about 43 in (108–110 cm). Measure with the tape level and use the calculator for an exact result.
Is 38DD a big size?
38DD has a very full cup volume for a 38 band. Cup letters only mean something next to the band: a 38DD holds the same as 28J or 30I.