From Wardrobe by Me:
The Safari and Bucket Hat PDF sewing patterns are classic soft hats with lining, stitch details on the brim, decorative band around the hat, and binding around the hat’s brim. The pattern is also compatible with kids' sizing.
Recommended Fabrics and Notions: Use canvas, cotton drill, medium woven cotton, denim, or other sturdy medium-weight woven fabric. Use light-weight cotton for the lining. Use medium-weight stiff interfacing. You will need: Fabric, Lining, Interfacing, Sewing thread, 2 snaps (optional), 4 eyelets (optional).
Sizes: Unisex size range. Head circumference from 20½ " - 25¼ " / 52 - 64 cm