Dinosaur Ring Ammonite Ring Prehistoric Paleo Engraved Flat Tungsten Ring - 4mm - 12mm This is a precision crafted ring from our line of Comfort Fit Tungsten Carbide Rings with a set of Ammonite patterns engraved around the entire ring. This dinosaur pattern ring is from our new line of Dinosaur rings. Custom animal tracks are available upon request. This ring style is available in 4mm, 6mm, 8mm, 10mm and 12mm It can be worn as a Wedding Ring or Promise Ring by men or women. Thorsten Jewelry is proud to present our Tungsten Carbide Wedding Bands line. Truly Free Lifetime Sizing and Lifetime Warranty on all tungsten rings, no exchange|sizing fees, which are charged by other retailers.