S	M	L
cm	55	57	60
covers cm	53 - 57	55 - 59	58 - 62
US cap size	6 ⅞	7 ⅛	7 ½

All sizes measure the inner circumference of the cap and correspond to head size. In order to ensure a completely perfect fit, all our caps are adjustable approximately ±2 cm due to their straps in the back.