Unicorn Helmet for 4/5/6/7/8 Year Olds, Toddlers and Elementary Schoolers (1st-2nd Grade), Lightweight, ASTM & CPSC Certified, Safe for Bicycles and S

XS: 46-50cm (18.7-20.2 inches) Recommended for babies and toddlers 1-3 years old S: 50-54cm (20.7-22.2 inches) Recommended for children 4-8 years old Dual-Certification ❘ This bicycle helmet meets American CPSC and ASTM safety standards. Comfortable and Convenient ❘ 360° protective cushion, removable and washable. Full-Direction Adjustment ❘ Four adjusters: head circumference adjuster, side ear adjuster, one-touch back, and length adjuster.