Convert head circumference to hat sizes
Wrap a soft tape measure around your head, about 1cm above your ears and eyebrows. Keep the tape level all the way around. This is your head circumference.
Wrap a soft tape measure around your head about 1cm (half inch) above your ears and eyebrows, where the hat would sit. Keep the tape level all the way around. This gives you your head circumference.
Letter sizes (S, M, L, XL) are general fits that cover a range of head sizes. Fitted sizes (like 7¼, 7½) are more precise and based on your exact head circumference. Fitted hats provide a more custom fit.
The average men's hat size is M to L, which corresponds to a head circumference of 56-59cm (22-23 inches). This is approximately US/UK fitted size 7 to 7⅜.
| Circ (cm) | Letter | US/UK | EU |
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