SUNVP Kids Toddler Bike Helmet Multi-Sport Skateboarding Skating Cycling Scooter Safety Protect Gear Adjustable Bicycle Helmet for Boys Girls Size: S: 41-52cm(16.2-20.5 inch) suit for 2-6 years old children. M: 45-56cm (17.7-22.1 inch) suit for 5-12 years old children Lightweight. PVC+ EPS. Comfortable and durable for your most satisfactory pair of bike helmet. Unique Design: Ten air vents can keep your head fresh and clear. One helmet adjuster. Certification: CE1078, CPSC. Give you a brand new cycling experience and quality assurance. BEST TODDLER BIKE HELMET - Thinking of which kids helmet to purchase on Amazon? We are confident that we are offering you the BEST VALUE FOR MONEY Kids Bike Helmet in the market. Apply to cycling, skiing, campingoutdoor sport exercise.