The Pro-Staff is hand crafted out of Red Stag Antler from New Zealand, Exotic Ebony and has a Gold nugget 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.