Size guide

  AGES WIDTH LENGTH
S (inches) 6-8 15 ¼ 20 ⅞
M (inches) 10-12 16 ¼ 22 ⅛
L (inches) 14-16 17 ¼ 23 ⅜
XL (inches) 18-20 18 ¼ 24 ⅜