One size fits most for this panama fedora hat Made with 80% polyester, 20% paper; brim measures 3.25" to keep the face shaded Internal sweatband to keep the head cool Blocks 88% UVA/UVB rays, with UPF 50+ as well Stay shaded and keep cool with this stylish, fun, sun hat NYFASHION101 Teardrop Dent Braided Trim Casual Panama Fedora Sun Hat - B34MIESWN