Our Sizes range from 56 to 60 
If you do not know your hat size, carefully measure your head using a flexible (cloth/plastic) tape measure.
To ensure you measure the circumference of your head correctly, the tape measure needs to be over the middle of your forehead, just above your ears and sit midway at the back of your head.
Do not pull the tape too tightly unless you want your hat to be as tight.
Measure yourself 2-3 times just to be as accurate as possible.
Take the measurements in CM.