- Adjustable Fit: This children's bike helmet features thick padding for a snug, comfortable fit, accommodating most head sizes. Inner dimensions measure 20 cm x 16 cm (7.87 inches x 6.30 inches), while outer dimensions are 35 cm x 19 cm x 23 cm (13.78 inches x 7.48 inches x 9.06 inches). - Multi-Purpose Use: Perfect for various activities, this helmet is suitable for balance bikes, skateboards, roller skates, and road or regular bicycles. It makes an excellent gift for birthdays, holidays, and special occasions. - Comfortable Design: Engineered for comfort, the helmet features a streamlined shape with ventilation holes and a removable, washable lining. Its breathable material keeps the head cool and comfortable, even during extended use. - Aerodynamic Performance: Designed to minimize wind resistance, this lightweight helmet ensures a cool and fatigue-free riding experience. Its breathable design enhances airflow while maintaining comfort. - Practical Applications: Ideal for daily commutes, weekend adventures, and outdoor sports, this helmet supports your child's safety and enjoyment in various activities. Whether they're riding to school or playing at the park, it enhances their experience while keeping them protected.