Global Sock Size Conversion Guide: US/EU/UK/JP Chart (2026)
When shopping for socks globally—or running an international apparel business—sizing can quickly become confusing. Does a \”US Sock Size 9–11\” fit a size 9 shoe? How do you convert US to EU sock sizes?
Each region uses its own logic: the US uses a mix of specific sock numbers and shoe sizes, Europe follows shoe sizes directly, and Japan uses precise centimeter measurements.
This complete guide explains how each country’s sizing works and provides easy comparison charts so you can pick the perfect fit, whether for men, women, or kids.
⭐United States (US): The Most Complex System
The US sock system is unique because it often uses a specific \”Sock Number\” scale that is not the same as the shoe size.
The \”Sock Number\” vs. \”Shoe Size\” Confusion
Many US brands (especially for athletic or mass-market socks) use ranges like 9–11 or 10–13.
- Sock Size 9–11 = Standard Women’s Size (Fits US Women’s Shoe 5–10)
- Sock Size 10–13 = Standard Men’s Size (Fits US Men’s Shoe 8–12)
US Men’s Sock Chart
| Sock Size Label | US Men\’s Shoe Size | Best For |
| Medium (M) | 6 – 8.5 | Smaller feet / Youth |
| Large (L) / 10–13 | 8 – 12 | Most Common Size |
| XL / 13–15 | 12 – 15+ | Big & Tall |
US Women’s Sock Chart
| Sock Size Label | US Women\’s Shoe Size | Best For |
| Small (S) | 4 – 6 | Petite feet / Older kids |
| Medium (M) / 9–11 | 6 – 10 | Most Common Size |
| Large (L) | 10 – 13 | Larger feet |
🛍️ Shop Recommendation: Looking for the perfect fit?
🇨🇦 Canada (CA): Mirrors the US
Good news for shoppers: Canada uses the exact same system as the United States.
- If you wear a US Men’s 10, you are a Canadian Men’s 10.
- Tip: No conversion is needed for US-Canada cross-border shopping.
🇪🇺 Europe (EU): The Straightforward System
European sock sizes are widely considered the easiest because they correspond directly to EU shoe sizes. There is no separate \”sock number.\”
Common EU Ranges
- EU 35–38: Standard Women / Small Men
- EU 39–42: Unisex / Medium
- EU 43–46: Standard Men
- EU 47–50: Large Feet
🇬🇧 United Kingdom (UK): The \”Size Down\” Rule
The UK system looks similar to the US system but typically runs one size smaller.
Common UK Sock Ranges
- UK 4–7: Standard Women’s fit
- UK 6–11: Standard Men’s fit (The most common range found in London shops)
- UK 11–14: Large feet
🇯🇵 Japan (JP): Precision by Centimeter
Japan uses the most logical system: Foot length in centimeters (cm).
To find your size, simply measure your foot from the heel to the tip of your longest toe.
- 22–24 cm: Women
- 24–26 cm: Small Men / Women with larger feet
- 26–28 cm: Standard Men
- 28–30 cm: Large Men
🧸Kids & Toddlers: Global Sock Size Chart
New Section! Buying socks for growing feet is difficult. Use this chart to find the right size for babies, toddlers, and youth.
| Age Group | US Shoe Size | EU Shoe Size | UK Shoe Size | Approx. Foot Length |
| Infant (0-12m) | 1 – 4 | 16 – 19 | 0 – 3 | 8 – 11 cm |
| Toddler (1-4y) | 4 – 9 | 20 – 26 | 3.5 – 8.5 | 12 – 16 cm |
| Little Kid (4-8y) | 10 – 3 | 27 – 34 | 9 – 2 | 17 – 21 cm |
| Big Kid (8-12y) | 3 – 7 | 35 – 39 | 2.5 – 6 | 22 – 24 cm |
🌍 The Master Chart: Global Sock Size Conversion
Use this universal chart to compare sizes across all major regions quickly. This is ideal for international travelers and e-commerce buyers.
| Size Label | US Men | US Women | EU | UK | Japan (cm) |
| S | — | 4 – 6 | 35 – 37 | 2 – 4 | 22 – 24 |
| M | 6 – 8.5 | 6 – 10 | 38 – 41 | 5 – 7 | 24 – 26 |
| L | 9 – 12 | 10 – 13 | 42 – 46 | 8 – 11 | 26 – 28 |
| XL | 12 – 15 | 13+ | 46 – 50 | 11 – 14 | 28 – 30 |
🧠 Frequently Asked Questions (FAQ)
This is the most confusing US size! Sock size 9-11 is NOT a shoe size. It refers to the length of the foot in inches for manufacturing purposes. In practice, a \”Size 9-11 Sock\” is the standard size for women, fitting US Women\’s shoe sizes 6–10.
In Europe (EU), yes. In the US and UK, no. US socks often use \”Small/Medium/Large\” or specific sock numbers (like 10-13) that cover a range of shoe sizes because socks are elastic and stretchable.
Place a piece of paper on the floor against a wall. Stand on it with your heel against the wall. Mark the tip of your longest toe. Measure the distance in centimeters. This is your precise size (perfect for Japanese sizing).
Final Thoughts
Whether you are buying athletic crew socks, wool hiking socks, or no-show liners, getting the size right ensures comfort and longevity.
- US/Canada: Check if the package says \”Shoe Size\” or \”Sock Size.\”
- Europe: Use your exact shoe size.
- Global: When in doubt, measure your foot in CM.
Ready to find your perfect pair? 👉 [Shop our New Arrivals] – Now that you know your size, find the style that suits you best!
Click here to download the PDF.
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