Shoe Size Calculator: Find Your Perfect Fit Across US, EU, UK, MX & JP

Finding the right shoe size online can be frustrating. A US 9 in Nike is not the same as a US 9 in Balenciaga, and an EU 42 from Dr. Martens fits differently than an EU 42 from Adidas. That is why we built this shoe size calculator — a simple tool that converts foot length, US size, or EU size into UK, Mexico, and Japan sizes in one click.

Why Use a Shoe Size Calculator?

Different countries and brands use completely different numbering systems. The United States uses US sizes, Europe uses EU sizes, the United Kingdom uses UK sizes, Japan uses centimeters (JP / Mondopoint), and Mexico uses its own approximate scale. On top of that, luxury brands like Chanel, Gucci, Dior, and Saint Laurent often run narrow or small, while boots from UGG and Timberland tend to run large.

Instead of guessing, our shoe size calculator lets you start with the measurement you already know. Enter your foot length in centimeters, your US size, or your EU size, and the calculator automatically computes every other system. The result is based on brand-specific sizing charts where available, so you get a more accurate conversion than a generic chart.

How to Measure Your Foot Length

The most reliable number is your foot length in centimeters. Stand on a piece of paper against a wall, mark the longest point of your foot, and measure from the wall to the mark. Do this for both feet and use the larger measurement. Once you have your cm value, type it into the shoe size calculator above and read off your US, EU, UK, MX, and JP sizes instantly.

Brands Covered

This calculator includes official or standard sizing data for over 30 brands, including Nike, Adidas, New Balance, ASICS, Puma, Reebok, Brooks, Hoka, On Running, Salomon, Converse, Vans, Jordan, Yeezy, Dr. Martens, Timberland, UGG, Birkenstock, Crocs, Balenciaga, Chanel, Gucci, Dior, Louis Vuitton, Prada, Saint Laurent, Bottega Veneta, Givenchy, Valentino, Hermès, Burberry, and Celine.

Common Sizing Tips

  • US to EU conversion is not always one-to-one. Use the calculator rather than adding or subtracting a fixed number.
  • UK sizes for men are usually one full size smaller than US sizes. For women, the gap is about two sizes.
  • JP sizes are simply your foot length in centimeters, making them the easiest international standard to understand.
  • Mexico sizes (MX) are approximate and vary by brand. Always double-check with the foot length column.
  • Luxury shoes from Chanel, Gucci, and Saint Laurent often run small — consider going up half a size if you have wide feet.

Bookmark this page and use our shoe size calculator every time you shop sneakers, boots, sandals, or designer shoes. It is the fastest way to avoid returns and make sure your next pair fits perfectly.

Shoe Size Calculator
Enter any: foot length / US / EU — all sizes auto-computed
Pick a brand → pick gender → fill any one box below (foot length cm / US / EU), and every other size is calculated automatically.
Foot length is the only physical standard — all sizes are derived from it. Brands fall into two types: Standard sport (Nike / Adidas / ASICS etc. share one chart) and Official unique (Dr. Martens / Birkenstock / Crocs / Balenciaga each have their own real size chart).
Measuring foot length is most accurate
Step 0.5
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▸ Show full size chart for 「this brand」
USEUUKMXJP (cm)Foot (cm)
Data sources: official size charts of Nike / Adidas / Dr. Martens / Timberland / UGG / Birkenstock / Crocs / Balenciaga etc., plus a generic sport-shoe standard, with ±0.5 size variance.
Mexican size (MX) is an approximation (US +1) and varies by retailer; before ordering, use foot length (cm) as the reference and verify against the brand's official chart.