TROXEL SPIRIT PERIWINKLE #1 SELLING Schooling Riding Safety Helmet SEI CERTIFICATION All Sizes Extended Soft-Tip Visor for extra sun protection GPS II Dial Fit System Mesh-covered vents - Removable, washable headliner - Flip-Fold headliner Small Up to 22 inches & Up to 7 hat size Medium 22 - 22 3/4 inches & 7 - 7 1/4 hat size Large 23 1/8 + inches & 7 3/8 + hat size