Why Your Shoe Size Isn't Always The Same Number
Unlike clothing, shoe sizing is at least based on an actual physical measurement — foot length — but every country maps that length to a different number scale, and every brand's "last" (the foot-shaped mold shoes are built around) is shaped slightly differently. That's why you can be a consistent 9 in one brand's sneakers and a 9.5 in another's flats, even though your foot obviously hasn't changed.
The Most Reliable Way To Convert
If you have any doubt at all, convert from your actual foot length in centimeters rather than from a size label you remember — length is the one number that doesn't drift between brands or countries. Every other conversion in this tool ultimately traces back to that measurement.
Half Sizes And In-Between Fits
When your foot length lands between two sizes, the right call depends on the shoe: for structured shoes with little give (flats, pumps, boots), size up to avoid pinching as the day goes on and feet swell. For shoes with stretch or an adjustable fit (sneakers with laces, sandals with straps), the smaller size in your range is often more secure.