The size chart below is a guide to equivalent sizes in other measures. If you are unsure of your head size, please remeasure your head in inches or centimeters.

Different hat manufacturer's size standards can vary.

cm	inches	UK	Universal	USA
54	21 1/4	6 5/8	small	6 3/4
56	22 1/8	6 7/8	medium	7
58	22 7/8	7 1/8	med large	7 1/4
60	23 3/4	7 3/8	large	7 1/2
62	24 1/2	7 5/8	x-large	7 3/4
63	24 7/8	7 3/4	xx-large	7 7/8