How the converter works
The calculator converts your foot length to centimetres, then estimates EU, US, UK, JP and Korean sizes from standard adult sizing.
Shoe lasts, socks and brand-specific charts can move the result by half a size or more. Measure both feet and use the longer one.
Measuring tips
- Measure in the evening, when feet are slightly larger.
- Wear the socks you plan to use with the shoes.
- If you are between sizes, choose the larger one for comfort.
Last reviewed October 27, 2026
Frequently asked questions
How do I measure my foot?
Stand on a sheet of paper, mark the heel and longest toe, and measure the distance. Measure both feet and use the longer one.
Is 25 cm a EU 40?
About EU 40 and US men’s 7.5. Brands vary, so use this as a guide and check the brand’s own chart.
Why are US men’s and women’s sizes different?
Women’s US sizes are usually about 1.5 sizes higher than men’s for the same foot length; UK women’s sizes differ by about 2 sizes.
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