The North American Pro-Staff is hand crafted out of Elk Antler, Exotic Ebony and has a mixed Gold Nugget Elk Ivory inlay. A Titanium band is used for strength and durability. You can also send in your own antler or change antler species. Millimeter width varies depending on size of ring. Can be made in sizes 6-15 If a bigger or smaller size is needed please email me. All sales final.