A US 10 in Asics converts to a UK 9. A US 10 in adidas converts to a UK 9.5. Same labeled size, different actual fit — because every brand builds shoes on its own "last," the 3D mold that shapes the shoe. No conversion chart, including this one, can fully account for that.
US to EU shoe size, and every other system
Enter a size in US Men's, US Women's, UK, EU, or foot length in centimeters, and see the equivalent in all the others — using a standard general chart rather than any one brand's specific numbers.
Shoe size chart in cm, the more reliable anchor
Foot length in centimeters is the most brand-independent number you can work with — when ordering from a specific brand, compare your cm measurement against that brand's own published chart rather than trusting a generic US/UK/EU label alone.
Foot length to shoe size, honestly approximate
This tool is upfront that it gives a general approximation, not a brand-guaranteed fit — for anything where precision matters (an unfamiliar brand, no return option), measure and check the brand's own chart.
