Size Details. Small: 53.5 cm Medium: 55 cm Large: 56 cm Extra Large: 58 cm
We suggest going up a size as this style runs slightly smaller.
Tips on how to measure your head: Gently wrap a string around your head starting at the center of your forehead an inch above your eyebrows. and a finger width distance above your ears to the most prominent point in the back of your head. Mark where the string meets and measure the start to the endpoint.