Extra Size Fitted Cotton Blend Cap - Black (For Big Head) 100% Polyester Made of 35% cotton and 65% polyester. 7 3/4(62 cm), 7 7/8(63 cm), 8(64 cm), 8 1/8(65 cm), 8 1/4(66 cm) and 8 3/8(67 cm) are available. Crown measures 4 inches high, 6 panels, constructed front, mid profile. Bill measures 4 inches long, pre curved, same color under bill. Thick, light and cool material.