Come and see our amazing products.The hat is made of cotton and has a buckle. Adjustable buckle straps to best fit one size. Circumference: 22.1-23.5 inches. Edge: 3.15 inches. Crown: 4.3 inches. Pigment dyed, washed, low-key retro, vent design increases the breathability of the hat, and is comfortable to wear all day. Our adjustable retro hats are a great choice for everyday activities and outdoor activities, especially jungle trekking, fishing, running, hitchhiking, baseball, cycling, golf, tennis. Pls confirm further with us if any query about packing info, inventory status and time schedule.