New Big Size Trucker Mesh Cap - Kelly (For Big Head) 100% Nylon Made of 50% cotton, 50% nylon. ONE SIZE fits most with adjustable plastic snap, fitting from XL to 3XL. Crown measures 4 inches high, 5 panels, constructed front. Bill measures 3 1/4 inches long, pre curved, same color under bill. Thick, soft and cool material.