O'Neill Adults Hood Size Guide

Metric sizing

Size Neck (cm) Head (cm)
Extra Small 36-38 48-53
Small 37-39 51-56
Medium 38-41 53-58
Large 39-42 56-61
Extra Large 41-43 58-64
2XL 42-44 61-66

Imperial sizing

Size Neck (in) Head (in)
Extra Small 14-15 19-21
Small 14½-15½ 20-22
Medium 15-16 21-23
Large 15½-16½ 22-24
Extra Large 16-17 23-25
2XL 16½-17½ 24-26