Big Size Conductor's Cap - Blue White (For Big Head) 100% Cotton Made of 100% cotton. One size fits most with adjustable velcrorized closure, base is at 8, fitting from XL to 3XL. Crown measures 4 inches deep, low profile, unconstructed crown, mesh lined inside. Bill measures 3 1/4 inches long, pre curved, same under color. Soft, light and cool material.