Sandbox Helmet Size Chart

Adults

Size	Small	Medium	Large
Centimetres	52 - 54cm	55 - 57cm	58 - 61cm
Inches	20.5" - 21.3"	21.7" - 22.4"	22.8" - 24.0"
Hat Size	6 1/2 - 6 3/4	6 7/8 - 7 1/8	7 1/4 - 7 5/8

Junior

Size	Ace
Centimetres	48 - 54cm
Inches	18.9" - 21.3"
Hat Size	6 - 6 3/4