Loop Cocoon™ baby earmuffs are designed to grow alongside your child, with adjustable sizing suitable for children from 1-4 and a strap circumference ranging from 40–56 cm for a comfortable, proper fit. They’re certified for children aged one to four years and have been extensively tested to meet all of the applicable CE requirements. Please note that this item, like any similar product, isn’t suitable for newborns and infants under 1 year old and until the fontanel is sufficiently developed.