How to measure your head
a quick guide :
A - With a measuring tape, start by the center of your forehead and run the tape around your head, passing by the occipital bone.
B - Measure your head from back to front, starting with your occipital bone, all the way to the center of your forehead.
C - Start the tape line where the edge of your hat will sit to the same point on the opposite side of your head near your ear.