I like this very much--the style, the fact it's recycled, and that you made your own pattern.
The bottom photo looks as if you might have sewed pleats or tucks into the top of the brim; if so, that must have been hard to do on a curve.
Thank you! What might look like pleats are just concentric rings of stitching. The brim is made from three layers of fabric, for stiffness, and the stitching keeps them together and adds stiffness, as well as a decorative element.