Reviewed
30K (UK 30H) bra size
A 30K has a 30-inch band and a K cup, about 11 inches between band and bust. In the UK it is 30H, in Australia 8H and in Europe 65K.
- US
- 30K
- UK
- 30H
- AU
- 8H
- EU
- 65K
- FR
- 80K
Also fits (sister sizes): 28L firmer band · 32J looser band · all same-volume sizes ↓
30K measurements
- Snug underbust
- 30–31 in · 76–79 cm
- Bust, fullest part
- about 41 in · 103–105 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.
30K sister sizes
Same cup volume, different band. If a 30K 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 30K doesn't fit
Not sure what's wrong? Run through the 4-point fit check.
30K questions
What is the sister size of 30K?
28L (one band down, one cup up) and 32J (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 30K in UK, Australian and European sizes?
UK 30H, Australia 8H, Europe 65K and France 80K. US and UK cup letters match up to DD and then split.
What measurements are a 30K?
A snug underbust of about 30–31 in (76–79 cm) and a bust of about 41 in (103–105 cm). Measure with the tape level and use the calculator for an exact result.
Is 30K a big size?
30K has a very full cup volume for a 30 band. Cup letters only mean something next to the band: a 30K holds the same as 28L or 32J.