adidas Cap Sizing
Product Label Head Circumference (in.)
0-2 Years 16.5 - or less
2-6 Years 18.9 - 19.7
6-12 Years 20.5 - 21.3
12 Years 21.3 - 22.0
S 21.3 - 22.0
M 22.0 - 22.8
L 22.8 - 23.6