Brush Polish Dome Shape Comfort fit Tungsten Carbide The picture shows the ring width is 8mm Rings Width:4MM 6MM 8MM 10MM 12MM(If you want a width that is not in the options, please contact customer service, we will reply within 12 hours.) Us Size:5/5.5/6/6.5/7/7.5/8/8.5/9/9.5/ 10/10.5/11/11.5/12/12.5/13/13.5/14/14.5/15 Note: the character of the inside ring is "Tungsten carbide", which is deleted as default. If you stick to have it engraved on "tungsten carbide" inside of ring, please tell me and email to us when you have ordered. Women's or Men's Tungsten Masonic Wedding Band - Blue And Gray Silver Tungsten Rings - Masonic Wedding Ring With Mens And Womens 4mm 6mm 8mm 10mm 12mm Tungsten carbide is ranked second hardest next to diamond on the Mohs scale, diamond being a 10 followed by Tungsten carbide as 9. Tungsten material does not cause irritation on the skin. Due to the Hardness of Tungsten carbide, Tungsten rings may be laser engraved, but CANNOT be engraved by hand. They CANNOT be stretched.