Bra fit calculator
Enter both measurements in centimeters. We calculate your band and cup across US, UK, EU and French systems.
Your size
US 30D · UK 30D · EU 75D · FR 90D
Bust − under-bust: 12.0 cm
Sister sizes
If the band feels tight, try one band up + one cup down (e.g. 34C → 36B) — same cup volume, looser band. If loose, try one band down + one cup up.
Full method: How to measure your bra size correctly.