Lx Lermx Kids Bike Helmet Ages 5?14, Adjustable From Toddler To Youth Size, Comfortable Design: LX LERMX Kids bike helmet for toddlers to Youth Size combines a super strong injection molded outer shell and a shock absorbing protective foam inner shell. Safely protects their little noggins from impact while providing comfort Light Wight: The lightest option for helmets - approximately 7.5 oz, without sacrificing safety, kids won?t feel tired after hours of wearing. Adjustable Fit: Adjustment dial system adjustable straps. circumference: 18. 9 to 21. 3 inches(45cm-54cm). One helmet can serve your children from 5 to 14 years old. Perfect Choice: Toddler helmet perfect for bike, bicycling, longboarding, roller, and inline skating, skateboarding, scooter, rollerblading, pogoing and all kinds of indoor and outdoor activities. It?s a perfect gift for your Children Suitable for various outdoor sports such as cycling, skateboarding and so on.