Find your sock size from your foot length, with US, UK and EU equivalents and a letter size to shop by.
Your sock size
How to use this tool
Measure heel to longest toe in centimetres or inches.
Type it in and pick the unit.
EU, US men’s, US women’s and UK are shown together.
Use the letter size when the brand sells S, M, L or XL.
Formula & worked example
A 27 cm foot is about EU 43, US men’s 10, UK 9 — a large (L) sock.
Limitations — read this before you rely on it
Approximate guide: brands cut sizes differently, and stretchy or compression socks fit a range of feet. Always check the brand’s own chart before ordering.
Frequently asked questions
Stand on a ruler or paper, heel against a wall, and measure to the tip of your longest toe. Measure in the evening, when feet are slightly larger.
Almost: most sock brands size by the shoe size they fit, so this tool converts foot length to the shoe-size scale first.
Size up. A slightly loose sock is comfortable; a tight one cuts in and wears out faster.
Yes, by about 1.5 sizes on the US scale: a US men’s 10 is roughly a US women’s 11.5.
Some brands use half sizes. If yours does not, round to the nearest whole EU size.