tapered brim adhesive secure closure straps size xs = 19 14 inch head circumference and 2 34 inch crown height size s = 20 14 inch head circumference and 3 inch crown height size m = 21 14 inch head circumference and 3 14 inch crown height size l = 22 14 inch head circumference and 3 12 inch crown heightmachine wash according to the care instruction label