54cm polyester hat. Mesh lining. Cool for the summer. - Size: 54cm - Material: 100% polyester - UPF: 50 Thank you for viewing. This khaki hat was purchased last year and has been used infrequently. The head circumference is adjustable, so it can be worn by those with a head size of 50, 52cm, and up. The color in the first photo is the closest to the actual color. I have checked it carefully, but there may be oversights. Please understand that this is a used item and no returns are accepted.