Shoe sizes aren't standardised, so a conversion is always an estimate. This tool converts between US men's, US women's, UK and EU sizes and gives the foot length in centimetres, using the typical relationships between systems for adult shoes. It's good for narrowing down a size before you check the brand's own chart.
How to use it
- Enter your shoe size.
- Choose which system it's in.
- Read the equivalents in the other systems.
- Check the brand's size chart before buying.
When it helps
- Ordering shoes from an overseas shop.
- Comparing UK and US sizes for a gift.
- Finding the foot length in centimetres.
- Checking sizes for imported footwear.
Good to know
- US men's and women's sizes differ by about one and a half sizes, so a men's 8 is roughly a women's 9.5.
- Measure your foot in centimetres and match that to a brand chart if you can; it's more reliable than any conversion.
- Boots, trainers and dress shoes fit differently even within one brand.
How shoe sizing works
Shoe sizes aren't standardised. Each system measures something slightly different: the US and UK count in steps of a third of an inch, with different starting points, while EU sizes use Paris points, each two-thirds of a centimetre. The tool maps between them using typical relationships for adult shoes.
Men's and women's US sizes differ because they started from different scales: a men's 7 is a women's 8.5. UK sizes are generally one below the men's US size. These patterns hold across most brands, with exceptions.
Worked example: ordering abroad
You wear a UK 8 and a site lists EU sizes. Enter 8 with UK selected and read the EU line: about 42. The US men's line shows 9 and the foot length about 27 cm. If the shop's chart gives a foot length, use it to double-check.
For women's shoes, choose the US women's option. A US women's 8 is roughly a UK 6 and an EU 39.
Measuring your foot
The most reliable method is to measure your foot. Stand on a sheet of paper, mark the heel and longest toe, and measure the distance in centimetres. Do it in the evening, when feet are slightly larger, and measure both because they often differ.
Then compare that length to the brand's size chart and add a little room, about half a centimetre to a centimetre, for comfortable walking.
Brand and style differences
Athletic shoes often run half a size larger or smaller than formal shoes, and width matters as much as length. Boots and narrow styles fit differently again. Reviews often mention whether a shoe runs large or small, which is worth reading.
If you order online, check the return policy. Even the best conversion can't account for the shape of a particular last.
Questions
Is a UK 8 the same as a US 8?
No, a UK 8 is about a US 9 in men's sizing.
Does it cover children's sizes?
No, adult sizes only.