2 Sizes Available : Small 18.9"-21.3" (48-54 cm), suitable for toddler kids 2-4 / 3-5 / 5-8 years old.Medium 21.3"-22.8" (54-58 cm), suitable for child youth 8-14 Sturdy : The kids bike helmet made of PC Shell and Thickend Shock-absorbing EPS Core,which can provide comprehensive and strong protection for children Large Visor : The child bike helmet equipped with Snap-in detachable visor can better prevent sun and rain,it also keeping their face from scraping or hitting the ground when crash Lightweight : Our kids bike helmet is ultra light just 255 g/0.55lb with 20 vents for less sweat and a more comfortable cycling even on hot summer days Extra Protection : The Kids helmet with extended coverage in the back,prevent the bike helmet from sliding around on your littles head,more stable and safety Fully Adjustable : Adjustable regulator and strap which make it flexible to fit for kids of different ages,suitable for boys,girls while in outdoor with balance bike, scooter, cycling, roller blading, skateboarding, skating etc. Trusted Safety Standard: Our helmet complies with the U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for persons aged 5 and older In-mold construction with impact resistance PC and EPS, light weight for kid's comfort wearing, and provides more safety. Suitable sports Cycling Skating Skateboarding Rollerblading Hiking Suitable users Toddler / Kid / Child / Boy / Girl / Youth / Teen Fully adjustable Crank adjustment dial in the back of the helmet and chin straps are adjustable to fit user comfortably from 360-degree. The chin straps are soft, no more worries about that the straps may scratch child's sensitive skin. Straps buckle is easy to fasten and release. Detachable visor It attaches very securely at the sides and does not come off easily;it also adds sun protection but most importantly it should help to protect a child’s forehead and face in the event of a crash. Colors and sizes Various colors and sizes for kids of different ages, genders, head circumferences. Color: Black / Blue / Red / Camouflage green / Blue yellow orange / Green pink gradient / Pink gradient / Pink purple gradient / Yellow green gradien t/ Yellow orange gradient / Purple blue gardient. Size: Please choose the helmet size according to the head circumference classification. Small: 18.9"-21.2" / 48-54 cm Medium: 21.3"-22.8" / 54-58 cm Package includes 1 x helmet Notice:the helmet is specifically a bicycle helmet, not intended for motorcycle use