【Brand Reliability】 Under Armour is a brand known for its high-quality sportswear. This hat is an excellent choice for active children. 【Comfortable Fit】 The ONESIZE (52-54cm) size fits growing children. The soft material gently wraps the head, providing a comfortable wearing experience. 【Excellent Material】 Made of a blend of 94% polyester and 6% polyurethane, it is durable and allows for ease of movement. - Brand: Under Armour - Color: Blue and Orange - Size: ONESIZE (52-54cm) - Material: 94% Polyester, 6% Polyurethane The size information was found online as it is not printed on the hat itself. As it is one size for youth sizes, I believe it is correct. Flat measurement is 24cm. Thank you for viewing.