Young Brunette Girl With A Blue Scarf Wearing A Hat On The Hill Above The Sea

Circumference in inches 13⅜ 17 18½ 18⅞ 19¼ 19¾ 20⅛-20½ 20⅞-21¼ 21⅝-22 22½-22⅞ 23¼-23⅝ 24-24⅜ 24¾-25¼ 25⅝-26
UK hat size - - 5¾ 5⅞ 6 6⅛ 6¼-6⅜ 6½-6⅝ 6¾-6⅞ 7-7⅛ 7¼-7⅜ 7½-7⅝ 7¾-7⅞ 8-8⅛
US hat size - - 5⅞ 6 6⅛ 6¼ 6⅜-6½ 6⅝-6¾ 6⅞-7 7⅛-7¼ 7⅜-7½ 7⅝-7¾ 7⅞-8 8⅛-8¼
French hat size - - 0 ½ 1 1½ 2-2½ 3-3½ 4-4½ 5-5½ 6-6½ 7-7½ 8-8½ 9-9½