This lady's sun hat is made of environmentally friendly paper straw. Each hat is hand-woven, lightweight, breathable, simple, and versatile. One size fits most women. The summer straw hat has a head circumference of 23.6 inches/60 cm and a brim of 3.5 inches/9 cm. A drawstring on the inside of the hat is located under the sweatband, allowing you to adjust the hat's circumference (make it tighter or send it if needed).