Children Summer Visor Hat Sun Protection Beach Cap Bucket Hat with Chin Strap Material: cotton. Head circumference about 18.9 in(48cm). It is fit for baby 0-1 years.Head circumference about 20.5 in(52cm). It is fit for baby 1-3 years. The cute hat is the perfect companion for those days. She is cuddly-soft lining and the pretty pattern makes it a great design. Therefore, you can wear the hat on those sunny days and will always be in style. Of course, it serves the purpose of sun protection. For everyday use, beach, fishing, hiking and so on. Please note: the age is only for reference,you can choose it according to your baby's head circumference.