Shoe size converter (US, UK, EU, JP)
Convert shoe sizes between US, UK, EU and Japanese systems using foot length in centimetres — the only method that survives brand variation.
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Stand on paper against a wall, mark your longest toe, measure heel to mark. Do both feet and use the longer one.
| Foot length (cm) | Inches | US | UK | EU |
|---|---|---|---|---|
| 22.4 | 8.8 | 4 | 3.5 | 36 |
| 22.9 | 9 | 4.5 | 4 | 36.5 |
| 23.3 | 9.2 | 5 | 4.5 | 37.5 |
| 23.7 | 9.3 | 5.5 | 5 | 38 |
| 24.1 | 9.5 | 6 | 5.5 | 38.5 |
| 24.6 | 9.7 | 6.5 | 6 | 39 |
| 25 | 9.8 | 7 | 6 | 40 |
| 25.4 | 10 | 7.5 | 6.5 | 40.5 |
| 25.8 | 10.2 | 8 | 7 | 41 |
| 26.2 | 10.3 | 8.5 | 7.5 | 42 |
| 26.7 | 10.5 | 9 | 8 | 42.5 |
| 27.1 | 10.7 | 9.5 | 8.5 | 43 |
| 27.5 | 10.8 | 10 | 9 | 44 |
| 27.9 | 11 | 10.5 | 9.5 | 44.5 |
| 28.3 | 11.1 | 11 | 10 | 45 |
| 28.8 | 11.3 | 11.5 | 10.5 | 45.5 |
| 29.2 | 11.5 | 12 | 11 | 46 |
| 29.6 | 11.7 | 12.5 | 11.5 | 47 |
| 30 | 11.8 | 13 | 12 | 47.5 |
| 30.5 | 12 | 13.5 | 12.5 | 48 |
| 30.8 | 12.1 | 14 | 13 | 48.5 |
| 31.6 | 12.4 | 15 | 14 | 49.5 |
| 32.4 | 12.8 | 16 | 15 | 50.5 |
| Code | Means | Usually |
|---|---|---|
| 2A / AA | Narrow | Women's narrow; rarely stocked in men's |
| B | Standard (women) / narrow (men) | The default width in women's shoes |
| D | Standard (men) / wide (women) | The default width in men's shoes |
| 2E / EE | Wide | Common in walking and running brands |
| 4E / EEEE | Extra wide | Specialist and orthopaedic fits |
| 6E | Extra extra wide | Diabetic and medical footwear |
Measure the foot, not the label
Shoe sizing has no international standard, and the three big systems were not designed to convert into one another. Converting a label to a label therefore compounds two approximations. Converting from a physical foot length introduces one, which is why every row in the charts here is anchored to centimetres.
How to measure
- Do it at the end of the day. Feet swell by up to half a size between morning and evening.
- Stand on a sheet of paper with your heel against a wall, wearing the socks you would wear with the shoes.
- Mark the paper at the tip of your longest toe — which is not always the big toe.
- Measure from the wall edge of the paper to the mark, in centimetres.
- Do both feet and use the longer measurement. Most people have a measurable difference.
Where the systems come from
| System | Unit | Measures |
|---|---|---|
| UK | Barleycorn, 1/3 inch | The last, starting from a zero point of 4 inches |
| US | Barleycorn, 1/3 inch | The same, with a different zero — hence the constant offset |
| EU (Paris point) | 2/3 cm | The last, not the foot |
| Japan / Mondopoint | Millimetre or centimetre | The foot itself |
Two of the four measure the last — the form the shoe is built on — which includes an allowance for toe room that varies by manufacturer. Only Mondopoint and Japanese sizing measure the foot, which is exactly why they are the only two that behave predictably.
The offsets people memorise
- Men: US ≈ UK + 0.5 to 1
- Women: US ≈ UK + 2
- Women's US ≈ men's US + 1.5, for the same foot
- EU ≈ 1.5 × (foot length in cm + 1.5)
These are rules of thumb, and they drift at the ends of the range. Use the chart rather than the arithmetic where the two disagree.
Width is the other half of a fit
Length gets all the attention and width causes most of the pain. American brands publish width letters — B is standard for women, D for men — and the ladder runs from 2A (narrow) to 6E (extra extra wide). European brands rarely publish a width at all, though some use a G or H fitting for wide. If a shoe is the right length but pinches across the ball of the foot, you need a wider fitting, not a longer shoe.
Toe room
Leave 10–15 mm between your longest toe and the end of the shoe — about a thumb's width. Less than that and downhill walking or running will bruise the toenail. This is why the chart lists a recommended shoe interior length alongside your foot length: they are not the same number, and buying a shoe whose interior equals your foot is buying a shoe that is too small.
Why brands still differ
Even with a perfect conversion, a running brand and a dress-shoe brand can be a full size apart at the same label, and a single brand's models vary between lasts. Where a brand publishes a foot-length chart, use theirs over this one — it describes their lasts, and this one describes the industry average. Where they do not, buy from a retailer with free returns and order both half sizes.
Questions
How do I measure my foot?
Stand on a sheet of paper with your heel against a wall, at the end of the day when your feet are largest. Mark the tip of your longest toe, measure heel to mark, and do both feet — use the longer one.
Why do converters disagree with each other?
Because there is no international standard. US and UK sizes come from the barleycorn (1/3 inch) system with different starting points; EU sizes use the Paris point (2/3 cm) applied to the last, not the foot. Only foot length in centimetres is unambiguous, which is why every row here is anchored to it.
What is Mondopoint?
Sizing by foot length in millimetres, sometimes with width. It is the ISO system, used for ski boots and military footwear, and it is effectively the same number as a Japanese size in centimetres.
What do the width letters mean?
They describe the girth of the shoe at the ball of the foot. D is standard for men and wide for women; B is standard for women. The table on this page lists the full ladder from 2A to 6E.
Will one size fit across brands?
No, and no chart can fix that. A running brand and a dress-shoe brand can be a full size apart at the same label. Buy by the foot length the brand publishes, and expect to try both half sizes.