Shoe Size Converter & Shoe Size Conversion Chart

Instantly convert shoe sizes between US, UK, EU, and foot length (cm / inches) for men, women, and kids — the free shoe size converter you can trust before every purchase.

⚡ Instant👨 Men · 👩 Women · 🧒 Kids🇺🇸 US · 🇬🇧 UK · 🇪🇺 EU · 📏 CM📋 Full Chart✦ 100% Free

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Shoe Size Converter — US / UK / EU / CM / Inches

I know my size in

My size

US—

UK—

EU—

Foot (cm)—

Foot (in)—

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How to Measure Your Foot for the Most Accurate Shoe Size Conversion

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Measure in the evening

Feet naturally swell throughout the day. Measuring in the late afternoon gives you the largest — and safest — size to buy.

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Wear your usual socks

Always measure with the same socks you'll wear with the shoes. Athletic socks add 2–4 mm compared to dress socks.

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Measure both feet

Most people have one foot slightly larger than the other. Always buy for the larger foot — you can add insoles for the smaller one.

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Trace on paper

Stand on a sheet of paper, trace your foot outline, then measure the longest distance from heel to longest toe. That's your foot length in cm.

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Leave 1 cm of room

The ideal shoe is 1–1.5 cm longer than your foot length. This "thumb rule" prevents toe compression, especially during walking or running.

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Always check the brand chart

Shoe size conversion charts are averages. Different brands — especially Nike vs. Adidas vs. New Balance — can vary by half a size. When in doubt, size up.

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Shoe Size Conversion Chart

US	UK	EU	Foot cm	Foot in

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Shoe Size Conversion Guide

Understanding Shoe Size Systems

Shoe sizing is one of the most confusing aspects of international shopping because every major region uses a completely different scale. A US men's 10, UK 9, EU 43, and 27.5 cm are all thesame physical shoe— just described differently.

US Sizing

The United States uses a numerical system where each full size equals roughly8.47 mm (⅓ inch)of foot length. Men's and women's sizes use different scales — a women's US 8 corresponds to a men's US 6.5. Half sizes are widely available.

UK Sizing

UK sizes follow the same step increment as US sizes but run approximately1.5 sizes smaller for menand2 sizes smaller for women. A men's US 10 = UK 9; a women's US 8 = UK 6.

EU (European) Sizing

EU sizes are based on theParis Pointsystem — each size equals ⅔ of a centimeter of foot length. EU sizing is gender-neutral (the same number means the same foot length for men and women). EU 43 = approximately 27.5 cm foot length.

CM Sizing (Japan / Korea)

Japan and South Korea size shoes byactual foot length in centimeters, making it the most straightforward system. A 27 cm shoe fits a foot that is 27 cm long. Always allow 0.5–1 cm for comfort.

Why Don't the Numbers Match Perfectly?

Shoe size conversion charts areapproximations. Manufacturers apply different lasts (foot molds), width allowances, and rounding conventions. Always check a brand's specific chart and — when buying online internationally — look for reviews mentioning fit.

Kids' Shoe Sizes

Children's sizing uses separate scales. US kids' sizes typically run from infant (0–3) through little kid (10.5–3) and big kid (3.5–7). EU kids' sizes start around 16 for infants. Once a child reaches EU 36–37 (US 4–5), they transition to adult sizing.

Wide vs. Narrow Widths

US width letters:AAA (narrowest) → AA → A → B → C/D (standard men) → E → EE → EEEE (widest)
Women's standardis B width;men's standardis D width
EU shoes rarely label width; some brands use F (standard), G (wide), H (extra wide)

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Shoe Size Conversion FAQ

What is a US men's 10 in EU shoe size?

A US men's 10 equalsEU 43–44andUK 9, corresponding to roughly 27.5 cm foot length. Most brands map US 10 to EU 43, though some (particularly European brands like Birkenstock) may use 44.

How do I convert women's US shoe size to EU?

For women's shoe size conversion, add30–31 to your US sizeto get the EU equivalent (this is a rough guide). A women's US 7 ≈ EU 37–38, US 8 ≈ EU 38–39, US 9 ≈ EU 39–40. Always check the brand's own chart as sizing varies.

Is EU shoe sizing the same for men and women?

Yes — EU (European) shoe sizes aregender-neutral. EU 40 always represents the same foot length (roughly 25.5 cm) regardless of gender. This makes EU the easiest system for international shoe size conversion.

How do I convert my shoe size to cm?

Measure your foot by standing on paper and tracing your outline, then measure from heel to the tip of your longest toe. For men, EU size ÷ 1.5 + 2 ≈ foot length in cm (approximate). For exact conversion, use the chart above or our shoe size converter tool.

What is the difference between US and UK shoe sizes?

For men, UK sizes are1 full size smallerthan US (US 10 = UK 9). For women, the difference is about2 sizes(US 8 = UK 6). Both systems use the same increment per size (⅓ inch / ~8.5 mm), they just start from different baselines.

How do kids' shoe sizes convert to adult sizes?

US kids' big kid size 7 is approximately equivalent to a US women's 8.5 or men's 7. The transition point from kids' to adult sizing usually happens between kids' 6–7 (EU 38–39). Women with smaller feet (US 5–6) can often wear kids' sizes to save money.

Why do shoe sizes differ between brands?

Brands use proprietary "lasts" (foot-shaped molds) that vary in length, width, and toe-box shape. Nike tends to run slightly narrow; New Balance runs wide; Adidas varies by model. Shoe size conversion charts give you a starting point — always read reviews and, when possible, try before you buy or order with free returns.