I used this hat for my child from about 2 to 5 years old, but the number of times it was worn is few because I also used other hats and my child didn't like wearing hats. The size can be adjusted with the back strap. The color is easy to match with clothes, and it can be worn by both girls and boys. It will be shipped compressed via Nekopos. Please refrain from purchasing if you are looking for a perfect item, as this is a used item.