👟 Shoe Size Converter
A US men’s 9 is a UK 8, an EU 42.5 and a 26.5 cm foot — but brands vary, so foot length in centimeters is the only reliable ground truth. Convert below — everything happens on your device.
US
9
UK
8
EU
42.5
Foot / JP
26.5 cm
Brands vary by up to half a size — when in doubt, trust the centimeter measurement. Add ~0.5 cm for running shoes.
How to measure
- Stand on a sheet of paper against a wall, heel touching the wall, wearing the socks you’d wear with the shoes.
- Mark the tip of your longest toe (it isn’t always the big toe) and measure wall-to-mark in centimeters.
- Measure both feet — they differ for most people — and use the larger one.
- Enter the centimeters in the converter; add ~0.5 cm of room for running shoes.
Sizing systems differ at the root: EU sizes count Paris points (2/3 cm each), UK sizes count barleycorns (1/3 inch) from a different zero than US, and Japan sensibly just uses foot length in centimeters (the ISO "Mondopoint" idea). Because every brand cuts its lasts differently, treat converted sizes as the starting point and the centimeter measurement as the truth.
Men's shoe size chart
| US | UK | EU | Foot length (cm) |
|---|---|---|---|
| 6 | 5 | 38.5 | 24 |
| 6.5 | 5.5 | 39 | 24.4 |
| 7 | 6 | 40 | 24.8 |
| 7.5 | 6.5 | 40.5 | 25.2 |
| 8 | 7 | 41 | 25.7 |
| 8.5 | 7.5 | 42 | 26 |
| 9 | 8 | 42.5 | 26.5 |
| 9.5 | 8.5 | 43 | 26.9 |
| 10 | 9 | 44 | 27.3 |
| 10.5 | 9.5 | 44.5 | 27.8 |
| 11 | 10 | 45 | 28.2 |
| 11.5 | 10.5 | 45.5 | 28.6 |
| 12 | 11 | 46 | 29 |
| 13 | 12 | 47.5 | 29.9 |
| 14 | 13 | 48.5 | 30.7 |
Women's shoe size chart
| US | UK | EU | Foot length (cm) |
|---|---|---|---|
| 5 | 3 | 35.5 | 21.6 |
| 5.5 | 3.5 | 36 | 22 |
| 6 | 4 | 36.5 | 22.4 |
| 6.5 | 4.5 | 37 | 22.9 |
| 7 | 5 | 37.5 | 23.3 |
| 7.5 | 5.5 | 38 | 23.7 |
| 8 | 6 | 38.5 | 24.1 |
| 8.5 | 6.5 | 39 | 24.6 |
| 9 | 7 | 40 | 25 |
| 9.5 | 7.5 | 40.5 | 25.4 |
| 10 | 8 | 41 | 25.9 |
| 10.5 | 8.5 | 42 | 26.2 |
| 11 | 9 | 42.5 | 26.7 |
| 12 | 10 | 44 | 27.6 |
Frequently asked questions
What is a US men’s 9 in EU and UK?
US men’s 9 = UK 8 = EU 42.5, fitting a ~26.5 cm foot. Women’s US 9 = UK 7 = EU 40 (~25 cm).
Why is my size different between brands?
Size numbers label the shoe’s last (the form it’s built on), and each brand shapes lasts differently — deviations of half a size are normal. Foot length in cm is brand-independent, which is why good size guides list it.
How do I convert women’s to men’s shoe sizes (US)?
Subtract about 1.5: a women’s US 8.5 corresponds to a men’s US 7 in athletic shoes. UK and EU sizes are mostly unisex scales.
Should I size up for running shoes?
Usually half a size (≈0.5 cm): feet swell during runs and toes need splay room. Fit them late in the day in your running socks.
Is this shoe size converter private?
Yes — it runs entirely in your browser. Sizes and body measurements are never sent to a server, logged or stored, and the page works offline.