International Clothing Sizes: Converting US, EU, UK, and Asian Sizes
Published April 24, 2026
A size M in the US is not the same as M in Europe or Asia. Chest measurements in inches (US) don't align with centimeters (EU); UK sizes offset from both. Online shopping across borders requires understanding these conversions—ordering the wrong size means returns, restocking fees, and delays.
Table of Contents
Understanding the Basics
US clothing sizes are arbitrary numbers (S, M, L, XL) mapped to chest measurements in inches. EU sizes use chest measurement in centimeters directly: EU 40 = 40 cm half-chest ≈ 80 cm full chest. Asian sizes (often marked in letters or numbers) tend toward smaller dimensions (an Asian M is often equivalent to a US XS or S).
Height and length vary regionally: US assumes average heights around 5 feet 5 inches to 5 feet 10 inches; European sizing includes tall/short variants; Asian sizing skews toward shorter statures. A "Regular" fit in the US might be "Short" or "Long" in Europe. Inseam conversions (inches to cm) matter for pants: a 32" inseam = 81.3 cm.
Clothing Measurement Units
- US Sizes (S, M, L, XL): Chest measurements: S ≈ 34-36", M ≈ 38-40", L ≈ 42-44", XL ≈ 46-48".
- EU Sizes (32, 34, 36, 38): Chest measurement in cm (half-chest): EU 36 = 36 cm half-chest = 72 cm full chest.
- UK Sizes (6, 8, 10, 12): Similar to EU but with slight offsets. UK 8 ≈ EU 36 ≈ US XS.
- Asian Sizes (XS, S, M, L, LL): Tend toward smaller—Asian M ≈ US XS. "LL" (Large Large) = standard US M.
- Inseam (inches to cm): 1 inch = 2.54 cm. 30" inseam = 76.2 cm; 32" = 81.3 cm; 34" = 86.4 cm.
Conversion Table
| from | to | factor |
|---|---|---|
| US Size | EU Size | US M ≈ EU 40; EU size ≈ US size + 32 |
| Chest inches | Chest cm | × 2.54 |
| US Inseam (in) | Metric Inseam (cm) | × 2.54 |
| UK Size | EU Size | UK 10 ≈ EU 38 |
Worked Examples
US to EU Conversion
US size M (chest ≈ 38-40"): 38" × 2.54 = 96.5 cm full chest. EU 48 (96 cm half) or EU 36 (72 cm, too small). Approximate: US M ≈ EU 40-42.
Asian Online Shopping
Asian online store: M size listed as 48 cm chest (full). In US terms: 48 cm = 18.9". That's child-sized. Select "LL" (Large Large) instead—labeled 60-62 cm, equivalent to US M.
Practical Applications
Online returns policy: Know your size in each region. Many stores offer free returns but charge restocking fees for size exchanges.
International brands: ZARA (EU), H&M (EU), Uniqlo (Asian), Gap (US)—each uses different size charts. Check size guides, not size names.
Shoe sizing: Separate chaos—US, EU, UK all different. Use length in cm when available.
International shipping: Add 1-2 weeks for return shipping before reordering; knowing your size in all regions minimizes back-and-forth.
Best Practices
💡 Screenshot or save the size chart from each retailer. Compare your measurements (chest, waist, length) in cm, not size letters. Letters are inconsistent; measurements are universal.
Screenshot or save the size chart from each retailer. Compare your measurements (chest, waist, length) in cm, not size letters. Letters are inconsistent; measurements are universal.
Common Mistakes
⚠️ Asian "M" is often equivalent to US XS or US S, not US M. "XL" in Asia ≈ US M or L. Always check the actual chest measurement in the size chart, not the letter.
Asian "M" is often equivalent to US XS or US S, not US M. "XL" in Asia ≈ US M or L. Always check the actual chest measurement in the size chart, not the letter.
Tools and Resources
- Clothing size converter: Input US size, get EU and UK equivalents
- Size chart comparisons: Many retailers publish side-by-side charts
- Body measurement guide: Instructions on how to measure chest, waist, inseam for accuracy
Key Takeaways
- US S/M/L/XL are arbitrary; EU sizes are chest measurements in cm. EU 40 = 40 cm half-chest = 80 cm full chest.
- Inch-to-cm conversion: 1 inch = 2.54 cm. US inseam 32" = 81.3 cm.
- Asian sizes skew smaller: Asian M ≈ US XS/S. Check actual chest measurements, not size letters.
- UK sizes: UK 10 ≈ EU 38 ≈ US 6. Slight offset from EU standard.
- Measure yourself in cm; compare to retailer's size chart (cm). This beats guessing by letters.