The Kinderfeets Toddler Bike Helmets are perfect for little balance bikers, scooters and skaters. An Adjustable Fit Dial System and padded chin strap provide additional comfort while an ABS outer shell and EPS liner ensure child safety. Features: -Two sets of Sweatsaver(™) -Fit Pads are included -Ventilation holes generation for maximum airflow -Circumference of 18 to 20.5 inches (46 to 52 centimeters)