This beautiful ring is 6mm in width. It is all high polish and flat top. If you are looking for a ring that is scratch proof and forever keeps its shine, then this tungsten carbide ring is for you. The ring is cobalt free and hypoallergenic. It will not cause skin irritations. Due to the hardness of tungsten, these rings can be laser engraved, but not hand engraved. Tungsten carbide is ranked second hardest next to diamonds on the Mohs scale, diamonds being a 10 followed by tungsten carbide as 9. Unisex.