International Size Conversion Chart
Convert between US, UK, EU, and International sizing systems
Search by band size, cup size, or complete size in any system
Size Conversion Tables
Understanding Sizing Systems
Learn about the differences between international bra sizing standards
Band sizes: US and UK use the same band numbering (28, 30, 32, 34, etc.) measured in inches.
Cup sizes: Generally aligned, but can differ in larger cup sizes. UK sizing typically extends further into larger cups.
Band sizes: EU uses centimeters (60, 65, 70, 75, etc.). Each EU size increases by 5cm, roughly equivalent to 2 inches.
Cup sizes: Uses letters similar to US/UK, but the measurement method and progression may differ slightly between countries.
Band sizes: Uses descriptive sizes (XS, S, M, L, XL) rather than numerical measurements. Less precise but easier to understand.
Cup sizes: Often maintains letter designations but may combine or simplify cup progressions for broader categories.
Sister sizes have the same cup volume but different band-to-cup ratios. For example, 34C, 36B, and 32D are sister sizes.
When to use: If your band size is unavailable, you can go up a band size and down a cup size (or vice versa) for similar fit.
- Always verify conversions with the specific brand, as sizing can vary
- When in doubt, measure yourself and use our calculator for accurate results
- Consider trying sister sizes if your exact size is unavailable
- European brands may fit differently even with correct size conversion
- Cup sizes can vary more than band sizes across systems