The Appalachian Malachite Edition is hand crafted out of Elk Antler, Exotic Ebony and has a dual Malachite 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 contact me (Stephen) 541-414-7938. All sales final.