Shoe Size Converter
US, UK, EU, and Japanese shoe sizes — or start from your foot length.
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Men's and women's numbering differ by about 1.5 US sizes for the same foot.
Men's — the whole row is below.
The same shoe in every system
- US9
- UK8.5
- EU42.5
- Foot length / Japan (cm)
Japanese sizes are the foot length in centimetres — the same number, used directly as the size.
27 cm
Men's conversion chart
| US | UK | EU | cm |
|---|---|---|---|
| 5.5 | 5 | 38 | 23.5 |
| 6 | 5.5 | 38.5 | 24 |
| 6.5 | 6 | 39 | 24.5 |
| 7 | 6.5 | 40 | 25 |
| 7.5 | 7 | 40.5 | 25.5 |
| 8 | 7.5 | 41 | 26 |
| 8.5 | 8 | 42 | 26.5 |
| 9 (your size) | 8.5 | 42.5 | 27 |
| 9.5 | 9 | 43 | 27.5 |
| 10 | 9.5 | 44 | 28 |
| 10.5 | 10 | 44.5 | 28.5 |
| 11 | 10.5 | 45 | 29 |
| 11.5 | 11 | 45.5 | 29.5 |
| 12 | 11.5 | 46 | 30 |
| 13 | 12.5 | 47.5 | 31 |
| 14 | 13.5 | 48.5 | 32 |
| 15 | 14.5 | 49.5 | 33 |
Use this as a starting point. Brands can differ by a whole size — running shoes often run half a size small. Your foot length is the most reliable number to go by.
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How to use it
Pick men’s, women’s, or kids’, then the size you know, to see the matching US, UK, EU, and Japanese sizes. Brands can vary by up to a whole size.
Pick men’s, women’s, or kids’, choose the size system you know, and find your size. The whole chart stays on screen with your row highlighted, so you can see the sizes either side too.
Not sure of your size? Measure your foot. Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, and measure. Do both feet and use the bigger one — and measure in the evening, when feet are largest.
Two handy rules: US women’s sizes are about 1.5 bigger than US men’s (a women’s 9 is roughly a men’s 7.5). UK sizes are about 0.5 smaller than US men’s.
Brands vary by up to a whole size, so if a brand has its own chart, compare your foot length with it.
US to EU shoe sizes
The most common conversion. EU sizes don’t go up evenly against US ones, so it’s written out in full.
| US | EU |
|---|---|
| 7 | 40 |
| 8 | 41 |
| 9 | 42.5 |
| 10 | 44 |
| 11 | 45 |
| 12 | 46 |
| 13 | 47.5 |
Women’s US to UK and EU
The US has separate numbers for women’s shoes, while the UK and EU use one scale for everyone. A US women’s 8 is a UK 5.5 and an EU 39.
| US women’s | UK / EU |
|---|---|
| 6 | UK 3.5 / EU 36.5 |
| 7 | UK 4.5 / EU 38 |
| 8 | UK 5.5 / EU 39 |
| 9 | UK 6.5 / EU 40.5 |
| 10 | UK 7.5 / EU 42 |
| 11 | UK 8.5 / EU 43 |
Foot length in centimetres
Japanese sizes are simply your foot length in centimetres. It’s the most reliable number to use when a brand has its own chart.
| Foot length | US men’s / women’s |
|---|---|
| 24 cm | M 6 / W 7 |
| 25 cm | M 7 / W 8 |
| 26 cm | M 8 / W 9 |
| 27 cm | M 9 / W 10 |
| 28 cm | M 10 / W 11 |
| 29 cm | M 11 / W 12 |
FAQ
What is a US size 9 in EU sizes?
A US men’s 9 is an EU 42.5, and a US women’s 9 is an EU 40.5.
How do I measure my foot?
Stand on paper with your heel against a wall, mark your longest toe, and measure. Use the bigger foot, and measure in the evening.
Are US women’s and men’s sizes the same?
No. Women’s sizes are about 1.5 higher for the same foot. UK and EU sizes are shared.
Why do shoes fit differently in the same size?
Shoe sizes aren’t standardised, and brands vary by up to a whole size. Your foot length in cm against the brand’s chart is most reliable.
What are Japanese shoe sizes?
Your foot length in centimetres. A 26 cm foot is a JP 26.
How it worksFor the curious
There is no formula between shoe systems; each was defined separately. English sizes count barleycorns (a third of an inch) from a fixed origin. Continental sizes use the Paris point (two thirds of a centimetre). Japanese sizing is Mondopoint: foot length in centimetres used directly as the size.
Conversions between them are conventions published by manufacturers, which is why this is a lookup chart rather than a calculation, and why some US half-sizes map to the same EU number.
No standards body enforces shoe sizing; running shoes often run half a size small, and Italian dress shoes narrower and shorter.