MATERIAL: This women's beach hat is made of Eco-Friendly Paper Straw, which makes it lightweight and flexible. Lots of classic and fantastic colors are designed for different preference to match all of your clothing, super versatile. SIZE: One Size Fit Most. Fit for Head circumference 21.5-22.8 Inch/54.6-58cm. Our summer straw hat comes with a draw string that located under the sweat band to adjust the diameter of the hat (To make it tighter or looser if needed).