100% twill cotton construction Unlined for ultimate comfort in warmer climates To determine your hat size: Measure the circumference of your head in inches, just a bit above your ears and brows. Divide the measurement by 3.14 (pi). Then round to the nearest 1/8 inch Plain color: Army Green, Black, Brown, Burgundy, Coffee, Dark Grey, Khaki, Light Blue, Light Grey, Navy, Orange, White; Traditional, Classic & Vintage Style 8 Panel Newsboy Cap