Our Devon telescope crown boater is made of 100% wheat straw and is finished with a simple genuine brown leather band and an upturned brim. Bonus: You can customize the fit using the size adjuster hidden in the sweatband under the label. Our Devon has a crown height of 4in. and a brim length of 2-3/4in. This hat is one size fits most. It is 57cm with a size adjuster hidden under the label that allows you to size down.