The Elk Ivory Pro-Staff is hand crafted out of Elk Antler, Exotic Ebony and has a crushed Elk Ivory inlay. If you are sending your own Antler or Ivorys, please click the customization box and put in the notes that you are sending your own Ivory or Antler. 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. My address is located under my Frequently Asked Questions tab. All sales final.