HJC Helmets Size Chart Size Hat Size Inches Centimeters XXS 6 3/8 - 6 1/2 20 - 20 1/2 51-52 XS 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53-54 SM 6 7/8 - 7 21 5/8 - 22 55-56 MD 7 1/8 - 7 1/4 22 1/2 - 22 7/8 57-58 LG 7 3/8 - 7 1/2 23 1/4 - 23 5/8 59-60 XL 7 5/8 - 7 3/4 24 - 24 3/8 61-62 XXL 7 7/8 - 8 24 3/4 - 25 1/4 63-64 XXXL 8 1/8 - 8 1/4 25 5/8 - 26 65-66 Youth S 6 1/8 - 6 1/4 19 1/4 - 19 3/4 49-50 Youth M 6 3/8 - 6 1/2 20 - 20 1/2 51-52 Youth L 6 5/8 - 6 3/4 20 7/8 - 21 1/4 53-54 Youth S/M 6 1/8 - 6 1/4 19 1/4 - 19 3/4 49-50 Youth L/XL 6 3/8 - 6 1/2 20 - 20 1/2 51-52 Have any questions? Need some help? Contact us! Accessories International Toll Free: 888-725-3679 (M-F 9AM-7PM EST) Intl: 786-242-5400 http://www.motoshop.net info@motoshop.net SE HABLA ESPAÑOL