To ensure a perfect fit, measure the circumference of your head starting in the middle of your forehead and match it with the sizes below:

XS/S 20 – 21.25 in (51 – 54 cm)

S/M 21 – 22.5 in (53 – 57 cm)

L/XL 22.5 – 23.5 in (57 – 60 cm)