Reviewed
42K (UK 42H) bra size
A 42K has a 42-inch band and a K cup, about 11 inches between band and bust. In the UK it is 42H, in Australia 20H and in Europe 95K.
- US
- 42K
- UK
- 42H
- AU
- 20H
- EU
- 95K
- FR
- 110K
Also fits (sister sizes): 40L firmer band · 44J looser band · all same-volume sizes ↓
42K measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 53 in · 133–136 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.
42K sister sizes
Same cup volume, different band. If a 42K 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 42K doesn't fit
Not sure what's wrong? Run through the 4-point fit check.
42K questions
What is the sister size of 42K?
40L (one band down, one cup up) and 44J (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42K in UK, Australian and European sizes?
UK 42H, Australia 20H, Europe 95K and France 110K. US and UK cup letters match up to DD and then split.
What measurements are a 42K?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 53 in (133–136 cm). Measure with the tape level and use the calculator for an exact result.
Is 42K a big size?
42K has a very full cup volume for a 42 band. Cup letters only mean something next to the band: a 42K holds the same as 34O or 36N.