Convert a shoe size between US Men's, US Women's, UK and EU sizing.
Uses standard fixed offsets — actual sizing can vary a little by brand.
US Women's sizes run about 1.5 sizes higher than the equivalent US Men's size — a men's size 9 is roughly a women's 10.5. The calculator applies this fixed +1.5 offset in both directions depending on which system you enter.
The EU ≈ US Men's + 33 offset is a standard approximation, but actual EU sizing is based on foot length in Paris points (⅔ cm) and can shift slightly by brand. Treat the EU figure as a close estimate, not an exact match.
Enter whichever size you already know — pick its tab (US Men's, US Women's, UK or EU) and the calculator converts to all four systems at once, so you don't need to do the math yourself.