Bicycle safety is paramount and a good helmet is essential. This bicycle helmet comes in different colors and styles for your child's personality.  This helmet has adjustable AcuDial fit system and a buckle under the chin that won't pinch the skin.  It fits a head 19.75 to 20.75 in.  A Giro helmet is about half the weight of a traditional helmet so it will be light, yet durable on your child's head.