Reviewed
34D bra size
A 34D has a 34-inch band and a D cup, about 4 inches between band and bust. In the UK it is 34D, in Australia 12D and in Europe 75D.
- US
- 34D
- UK
- 34D
- AU
- 12D
- EU
- 75D
- FR
- 90D
Also fits (sister sizes): 32DD firmer band · 36C looser band · all same-volume sizes ↓
34D measurements
- Snug underbust
- 34–35 in · 86–89 cm
- Bust, fullest part
- about 38 in · 95–98 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.
34D sister sizes
Same cup volume, different band. If a 34D 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 34D doesn't fit
- Band rides up at the back
- Try 32DD
- Band digs in, cups fit
- Try 36C
- Spilling over the cups
- Try 34DD
- Cups gape or wrinkle
- Try 34C
Not sure what's wrong? Run through the 4-point fit check.
Compare 34D
Sizes next to 34D
34D questions
What is the sister size of 34D?
32DD (one band down, one cup up) and 36C (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 34D in UK, Australian and European sizes?
UK 34D, Australia 12D, Europe 75D and France 90D. US and UK cup letters match up to DD and then split.
What measurements are a 34D?
A snug underbust of about 34–35 in (86–89 cm) and a bust of about 38 in (95–98 cm). Measure with the tape level and use the calculator for an exact result.
Is 34D a big size?
34D has a fuller cup volume for a 34 band. Cup letters only mean something next to the band: a 34D holds the same as 28G or 30DDD.