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Troy Lee Designs Helmet Size Chart

D3 Helmets

Helmet Size Hat Size Centimeters Inches
X-Small 6 1/2 - 6 5/8 52 - 53 20.5 - 20.9
Small 6 3/4 - 6 7/8 54 - 55 21.3 - 21.7
Medium 7 - 7 1/8 56 - 57 22 - 22.4
Large 7 1/4 - 7 3/8 58 - 59 22.8 - 23.2
X-Large 7 1/2 - 7 3/4 60 - 62 23.6 - 24.4
XX-Large 7 7/8 - 8 1/8 63 - 65 24.8 - 25.6

D2 Helmets

Helmet Size Hat Size Centimeters Inches
XS/SM 6 1/2 - 6 7/8 53 - 55 21 - 22
MED/LG 7 - 7 3/8 56 - 59 22.4 - 23.3
XL/XXL 7 1/2 - 7 3/4 60 - 62 23.7 - 24.5

A1 Helmets

Helmet Size Hat Size Centimeters Inches
XS/SM 6 3/4 - 7 54 - 56 21.3 - 22
MED/LG 7 1/8 - 7 3/8 57 - 59 22.4 - 23.2
XL/XXL 7 1/2 - 7 7/8 60 - 62 22.6 - 24.8