Sterling Silver and Native American made. Medium size is 1" in diameter. The elastic band can be changed easily at any time. Unisex so great for either him or her. Head silversmith is Daniel Tapija, Jr. (Yavapai/Hopi/Apache/Hualapai). He began his apprenticeship 1984. Dan now takes modest pride in his beautiful, precision hand stamping and soldering, which have earned him the title of master silversmith.