Shoe size converter
Convert between EU, US (men & women), UK and centimetres. Pick what you know, and see the rest. Reference charts for men, women and kids are below.
Last updated June 2026 · ARFits Editorial
Convert a size
Values come from the standard adult reference table below. Conversions for "cm" use the closest charted foot length. Not sure of your foot length? See how to measure your foot size at home. Brands vary — always sanity-check against the brand's own chart, or use a guided foot scan.
Reference conversion charts
Standard, widely-accepted conversion values. Foot length (cm) is the approximate length the size is built around. These are general references — actual fit varies by brand, model, last, and width.
Men's shoe sizes
| EU | US | UK | Foot length (cm) |
|---|
Women's shoe sizes
| EU | US | UK | Foot length (cm) |
|---|
Kids' shoe sizes
| EU | US | UK | Foot length (cm) |
|---|
Kids' feet grow quickly — leave roughly 10–15 mm of growing room and re-measure every few months. Children's sizing is the least standardised across brands.
Want a size suggestion for a specific brand instead? Use the size recommender. And for clothing rather than shoes, the clothing size converter maps your measurements to a size across major fashion brands.
How shoe-size systems are defined
The conversions above are not arbitrary — each system grades sizes in a fixed physical increment of last length. Understanding those increments explains why the systems never line up evenly. The figures below follow classic footwear-construction standards.
EU sizes — the French / Paris-point system
European (Continental) sizes use the French, or Paris-point, system. One EU size equals one Paris point, defined as 2⁄3 cm — about 6.67 mm of last length. That single increment is why each EU step is ~6.67 mm. The classic French system has no half sizes and runs roughly from 18 to 48.
UK & US sizes — the English inch system
British and American sizes use the English inch system. One full size equals 1⁄3 of an inch — about 8.47 mm (1 inch = 25.4 mm), and a half size equals 1⁄6 inch — about 4.23 mm. UK and US differ mainly in where the scale starts (and US splits men's versus women's). Because the English step (~8.47 mm) is larger than the EU step (~6.67 mm), the EU↔UK/US mapping is not a constant offset — the gap drifts across the range.
Metric / Mondopoint (ISO)
The metric, or Mondopoint, system (ISO) labels a shoe directly by foot length in millimetres; a common grading step is 5 mm (half a centimetre). It is the most directly physical of the systems and is widely used for athletic and military footwear.
One size step, by system
| System | Base unit | One size step |
|---|---|---|
| EU / French | Paris point (2⁄3 cm) | 6.67 mm |
| UK & US | English inch (1⁄3 in) | 8.47 mm full · 4.23 mm half |
| Metric / Mondopoint | Millimetre of foot length | 5 mm typical |
Converting between systems — the underlying formulas
These are the classic trade conversion rules from the same footwear-construction standards. They use metric size (≈ last length in centimetres) as the common reference.
| Conversion | Formula | Example |
|---|---|---|
| French → metric | metric = French × 0.667 | French 42 → 28.0 |
| metric → French | French = metric × 1.5 | 28 → 42 |
| English (small) → metric | metric = (English + 12) × 0.846 | — |
| English (large) → metric | metric = (English + 25) × 0.846 | — |
| metric → English (small) | English = metric ÷ 0.846 − 12 | — |
| metric → English (large) | English = metric ÷ 0.846 − 25 | — |
Worked example: a French (EU) 42 gives metric = 42 × 0.667 ≈ 28.0 cm of last length, and going back, 28 × 1.5 = 42 — the round trip recovers the original size.
These are classic conversion rules from footwear-construction standards. Real brands still vary by last and width, so treat them as the baseline, not the final word: see shoe width and girth for width, and the size recommender for brand-specific offsets.
Frequently asked questions
How do I convert my shoe size between EU, US, UK and cm?
Pick the system you already know (EU, US men's, US women's, UK, or cm) and a value in the converter, and it shows the equivalents in every other system. The values come from a standard adult reference table, and the cm option uses the closest charted foot length.
Are these conversions exact for every brand?
No. These are standard, widely-accepted reference values. Actual fit varies by brand, model, last, and width, so always sanity-check against the brand's own size chart, or use a guided foot scan for a per-model result.
What does the "foot length (cm)" column mean?
It is the approximate foot length the size is built around, not the length of the shoe itself. It is useful for matching a measured foot to a size when you do not already know your size in EU, US, or UK.
How should I handle kids' shoe sizes?
Kids' feet grow quickly, so leave roughly 10–15 mm of growing room and re-measure every few months. Children's sizing is the least standardised across brands, so treat the kids' chart as a starting reference.
What is a Paris point / why is one EU shoe size 6.67 mm?
EU sizing is the French Paris-point system; one point = 2/3 cm ≈ 6.67 mm of last length, which is why each EU size is that increment and the classic French scale has no half sizes.
Why don't EU and UK sizes line up evenly?
Because they use different base units — EU steps are Paris points (~6.67 mm) and UK/US steps are 1/3 inch (~8.47 mm), so the gap between a whole EU size and a whole UK size drifts across the range rather than staying constant.