Eternal Greek Key Wedding Ring A modern twist on a classic men's ring, this 7mm Men's Eternal Greek Key Wedding Ring is a sophisticated piece of jewelry that you can enjoy wearing every day. Beautifully finished in polished tungsten ring, cobalt ring, or ceramic ring, and complemented with a white, yellow or rose gold centerpiece, this stylish ring for men is available in 10kt, 14kt and 18kt, and 9mm and 11mm widths. Personalize the inside of this ring with our engraving service.