Reviewed
42DDD (UK 42E) bra size
A 42DDD has a 42-inch band and a DDD cup, about 6 inches between band and bust. In the UK it is 42E, in Australia 20E and in Europe 95F.
- US
- 42DDD
- UK
- 42E
- AU
- 20E
- EU
- 95F
- FR
- 110F
Also fits (sister sizes): 40G firmer band · 44DD looser band · all same-volume sizes ↓
42DDD measurements
- Snug underbust
- 42–43 in · 107–109 cm
- Bust, fullest part
- about 48 in · 121–123 cm
- Cup difference
- 6 in (DDD 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.
42DDD sister sizes
Same cup volume, different band. If a 42DDD 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 42DDD doesn't fit
- Band rides up at the back
- Try 40G
- Band digs in, cups fit
- Try 44DD
- Spilling over the cups
- Try 42G
- Cups gape or wrinkle
- Try 42DD
Not sure what's wrong? Run through the 4-point fit check.
42DDD questions
What is the sister size of 42DDD?
40G (one band down, one cup up) and 44DD (one band up, one cup down). Sister sizes hold the same cup volume on a different band.
What is 42DDD in UK, Australian and European sizes?
UK 42E, Australia 20E, Europe 95F and France 110F. US and UK cup letters match up to DD and then split.
What measurements are a 42DDD?
A snug underbust of about 42–43 in (107–109 cm) and a bust of about 48 in (121–123 cm). Measure with the tape level and use the calculator for an exact result.
Is 42DDD a big size?
42DDD has a very full cup volume for a 42 band. Cup letters only mean something next to the band: a 42DDD holds the same as 28M or 30L.