International Clothing Size Guide: US, UK, EU and Asian Sizes Explained

June 8, 20265 min read

Shopping online opens access to global fashion — but comes with a notorious hurdle: international sizing discrepancies. A medium in one country can be an extra-large in another. Without a clear conversion guide, global shopping means guessing.

Why Sizes Vary Globally

US and UK: Use imperial measurements (inches). Historically designed around larger average skeletal structures. "Vanity sizing" — where garment dimensions are gradually enlarged — is prevalent.
Continental Europe: Uses metric measurements. France, Italy, and Germany build charts on unique European anthropometric data. A US dress size 6 is approximately EU size 38.
Asia: Japan, South Korea, and China build sizing around generally shorter statures and narrower frames. A Western medium typically corresponds to a large or extra-large from Asian brands.

Always use an online clothing size converter rather than relying on generic S/M/L labels when shopping internationally.

Men's Sizing

For suits and coats, the US and UK share chest-measurement sizing (size 40 = 40-inch chest). Continental Europe adds 10 — making US/UK 40 an EU 50. For casual tops, Asian sizing typically runs one to two full sizes smaller than equivalent US or UK.

Women's Sizing

More variable across brands and regions. US size 6 converts to approximately UK 10, EU 38, and Japanese size 9 or 11. European sizes run a different numerical scale (32–46+), while Asian sizing trends significantly smaller.

Children's Sizing: Age vs. Height

In the US and UK, children's clothing is categorized by age (2T, 4T, 5–6 Years). European and Asian manufacturers use height in centimeters — a size 104 fits a child up to 104 cm tall. Height-based sizing is far more objective and reliable than age-based.

How to Measure Yourself

Chest/Bust: Around the fullest part of the chest, parallel to the floor.
Waist: Around the natural waistline, just above the belly button.
Hips: Around the fullest part of the hips and glutes.
Inseam: From the highest point of the inner thigh to the ankle bone.

Conclusion

Keep your measurements in both inches and centimeters, and use an online clothing size converter when shopping from international brands for a consistently accurate fit.

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Frequently Asked Questions

How do I convert US women's sizes to European?+

Generally add 32 to your US size to get the EU equivalent. US size 6 ≈ EU 38; US size 8 ≈ EU 40. Always verify with the specific brand's size chart, as variation exists.

Why do Asian clothing sizes run small?+

Asian sizing standards were developed based on average body measurements within East Asian populations, which historically trend toward shorter heights and narrower frames. This is a chart baseline difference, not a quality issue.

How do shoe sizes work internationally?+

Men's US size 9 ≈ EU 42, UK 8. Women's US size 8 ≈ EU 39, UK 6. Asian sizes are typically expressed as foot length in centimeters. Use our shoe size calculator for precise conversions.

What does S/M/L mean internationally?+

These labels are not standardized. An M from a US brand differs significantly from an M from a Japanese brand. Always check the brand's measurement chart rather than relying on the label alone.