Our rose Pia ultra-wide brim sun hat is made of 100% hand woven sisal straw and features a genuine leather stampede strap making it the perfect shady accessory even on a windy day. Bonus: You can customize the fit using the size adjuster hidden in the sweatband under the label. Our Pia has a crown height of 5in. and a brim length of 5-1/4in. This hat is one size fits most. It is 57cm with a size adjuster hidden under the label that allows you to size down.