Schwinn Classic Toddler Bicycle Helmet, ages 3 - 5, blue / multi: Full Schwinn 360° Comfort featuring an adjustable dial fit knob and full-range padding for the perfect custom fit Lightweight micro shell design won't weigh you down while you ride 10 crucial air vents provide maximum ventilation on hot summer rides Full shell coverage offers the ultimate protection for your noggin Fits riders age 3 - 5. CPSC approved for bike riding Helmet dimensions (LXWXH): 13.7x6.5x7.87