How we calculate

The basis: body measurements, not label numbers

Every chart starts from body measurements in centimeters, the way the European standard EN 13402 recommends labeling clothes. We map those measurements to the German sizing system, which most of Europe follows, and derive the sizes of other countries from there.

The conversion rules

• Women: FR = DE + 2, IT = DE + 6, UK = DE − 28, US = DE − 32. Petite = DE ÷ 2, tall = DE × 2.
• Men: DE = FR = IT, UK/US = chest in inches = DE − 10. Short sizes = DE ÷ 2, long sizes = DE × 2 − 2.
• Shirts: collar size in centimeters; in inches = cm ÷ 2.54, rounded to the usual inch steps.
• Jeans: W and L in inches; 1 inch = 2.54 cm.
• Kids: size = height in centimeters, in steps of 6 cm.
• Shoes: European sizes are based on the Paris point (⅔ cm), UK and US sizes on the barleycorn (⅓ inch), and Mondopoint (ISO 9407) on foot length in millimeters. Because the systems start at different points and use different steps, our chart follows the conversions used by the large sports brands.
• Bras: band = underbust rounded to the nearest 5 cm; cups in 2 cm steps of the difference between bust and underbust, starting at 12 cm for cup A. UK/US bands in inches, French bands = EU + 15.

The limits of any conversion

There is no binding worldwide size standard. Brands cut for different target groups, use their own lasts and fits, and some label deliberately generously. Our numbers are therefore guidelines that work well for most brands – but not for all of them. Before you order, always compare your measured body measurements with the manufacturer's size chart.

Updates and corrections

These charts were last reviewed on September 17, 2026. Spotted a discrepancy? Write to us using the contact details in the legal notice.