Find your hat size from head circumference in centimeters.
The measured head circumference sets the numeric size and maps onto a standard letter band. A hat squeezed or floating is both uncomfortable and looks wrong, so the measurement matters.
Hat Size
cm = measured circumference; US = band from cm
cm = measured circumference; US = band from cm The measured head circumference sets the numeric size and maps onto a standard letter band.
A hat squeezed or floating is both uncomfortable and looks wrong, so the measurement matters.
This calculator takes 1 input: Head circumference. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.