Hats and softies
The following are the general measurements that apply when we offer hat or softie with a choice between S/M and M/L.
Circumference between 54 cm and 56 cm fits S/M
Circumference between 57 cm and 63 cm fits M/L
What to do if you're between 56 and 57 cm? Well either will fit. The S/M will be a tighter fit so we believe the M/L will be a more comfortable choice for most people.
How to measure:
The circumference of your head is the distance around the boundaries of where your natural hairline would be, as illustrated below: