How to calculate your head size?Nothing's easier. Take a measuring tape or print our measuring tape and assemble it as indicated.Then place the meter around your head where the hat would rest (in principle, between 0.5 and 1 cm above the ears). Do not overtighten the meter, otherwise you risk making a measurement error. Once the measurement is made, find your size in the table below. If your size main falls in the middle of two sizes, preferably choose the larger. The hat will be all the more comfortable. If, despite everything, you want to reduce the size, we offer you in our section Accessory of size reducing cork strips.