US Marine Fan Shape Large Patch Cap - Black Corps cotton/polyester Made of 65% polyester and 35% cotton. One size fits most with adjustable plastic snap closure, fitting up to 7 1/2. Crown measures 3 1/2 inches deep, 6 panels, constructed, high profile. Bill measures 2 3/4 inches long, pre curved, same color under bill. Thick, soft and light material.