Materials : Cotton It fits for girls between 3-6 months.Please note: the age is only for reference,you can choose it according to the baby’s head circumference. Hat circumference about 16.9 in(43cm). The size can be adjusted in the back of the hat. 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.