1.Hats can adjust the size of the size (55CM-59CM) 2.The material is Polyester+cotton.(Polyester to ensure the clarity of printing.) 3.The interior is a double layer of material. 4.hese measurements were done by hand and there may be minor variation in their accuracy. 5.Due to variations in lighting and display settings, Because of the monitor there are some minor differences. 6.This hat is suitable for adults to wear, not suitable for children. 7.This hat is not suitable for winter wear.