Hat Sizing Guide

Euro CMS Sizes Jockey Sizes Riding Helmet Sizes
51 OOO 6¼
52 OO 6⅜
53 0 6½
54 0.5 6⅝
55 1 6¾
56 1.5 6⅞
57 2 7
58 2.5 7⅛
59 3 7¼
60 3.5 7⅜
61 4 7½
62 4.5 7⅝
63 5 7¾