YiKaiSu Unisex Kid Baby Sun Protection Baseball Beach Cap Hat Hip Hop Hat Baby Cap Material: Cotton It fits for ages 1-3 years. ( the age is only for reference,you can choose it according to your baby's head circumference.) Suitable for baby whose head circumference is from 18.9- 20 inches/48-51 cm. This hat can be use for the sun protection, keeps your baby's head nice and warm, it can be worn all the year round. This hat can be adjusted in the back. It is lightweight, soft, comfortable, stylish and cute style, very durable, easy to wash and carry. For everyday use, beach, fishing, hiking and so on. If you have any questions, please feel free to contact us, we will try our best to solve problem make you satisfied. Wishes your shopping happily.