To accurately determine the size, it is necessary to measure the circumference of the head as shown in the picture below. The measurement is taken above the eyebrows, straight above the ears and does not go down to the back of the head.
Sizes are expressed in two numbers. If you want a cap according to the exact circumference of your head, please indicate the number in the notes when purchasing (example: 57cm).
* If you are buying for someone as a gift, our recommendation is M size - 57.58cm.