Reviewed
34K (UK 34H) bra size
A 34K has a 34-inch band and a K cup, about 11 inches between band and bust. In the UK it is 34H, in Australia 12H and in Europe 75K.
- US
- 34K
- UK
- 34H
- AU
- 12H
- EU
- 75K
- FR
- 90K
Also fits (sister sizes): 32L firmer band · 36J looser band · all same-volume sizes ↓
34K measurements
- Snug underbust
- 34–35 in · 86–89 cm
- Bust, fullest part
- about 45 in · 113–116 cm
- Cup difference
- 11 in (K 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.
34K sister sizes
Same cup volume, different band. If a 34K 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 34K doesn't fit
Not sure what's wrong? Run through the 4-point fit check.
34K questions
What is the sister size of 34K?
32L (one band down, one cup up) and 36J (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 34K in UK, Australian and European sizes?
UK 34H, Australia 12H, Europe 75K and France 90K. US and UK cup letters match up to DD and then split.
What measurements are a 34K?
A snug underbust of about 34–35 in (86–89 cm) and a bust of about 45 in (113–116 cm). Measure with the tape level and use the calculator for an exact result.
Is 34K a big size?
34K has a very full cup volume for a 34 band. Cup letters only mean something next to the band: a 34K holds the same as 28N or 30M.