The Calloway is Will & Bear's best selling silhouette and you can now get it in straw! Handwoven from premium, light-weight and durable bao straw, the Calloway Straw wide brim fedora is perfect for any adventure. The Calloway is a unisex style that suits both women and men. Details: Beathable woven paper straw Rated excellent sun protection UPF 50% Lightweight 11cm height teardrop shaped crown 7cm Width Flat Brim Will & Bear Size Guide: Size S M L XL XXL CM 55 57 59 61 63 What's my size? The best way to determine what your size is to measure the circumference of your head where you want to wear it. Measuring your head: Measure the circumference of your head approximately 2.5cm (1") below the hairline to the back of the head. If you are unsure or in between sizes we recommend sizing up and adding some hat fillers for the perfect fit.