Reviewed
30D bra size
A 30D has a 30-inch band and a D cup, about 4 inches between band and bust. In the UK it is 30D, in Australia 8D and in Europe 65D.
- US
- 30D
- UK
- 30D
- AU
- 8D
- EU
- 65D
- FR
- 80D
Also fits (sister sizes): 28DD firmer band · 32C looser band · all same-volume sizes ↓
30D measurements
- Snug underbust
- 30–31 in · 76–79 cm
- Bust, fullest part
- about 34 in · 85–88 cm
- Cup difference
- 4 in (D 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.
30D sister sizes
Same cup volume, different band. If a 30D 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 30D doesn't fit
- Band rides up at the back
- Try 28DD
- Band digs in, cups fit
- Try 32C
- Spilling over the cups
- Try 30DD
- Cups gape or wrinkle
- Try 30C
Not sure what's wrong? Run through the 4-point fit check.
Compare 30D
Sizes next to 30D
30D questions
What is the sister size of 30D?
28DD (one band down, one cup up) and 32C (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 30D in UK, Australian and European sizes?
UK 30D, Australia 8D, Europe 65D and France 80D. US and UK cup letters match up to DD and then split.
What measurements are a 30D?
A snug underbust of about 30–31 in (76–79 cm) and a bust of about 34 in (85–88 cm). Measure with the tape level and use the calculator for an exact result.
Is 30D a big size?
30D has a mid-range cup volume for a 30 band. Cup letters only mean something next to the band: a 30D holds the same as 28DD or 32C.