This Tungsten Carbide Ring is 8mm wide, comfort fit and has a flat brushed top and polished finish edges. NOTE: Comfort fit rings fit a little large. Please make sure to order a half size smaller than you would for a regular ring. Comfort fit finish on the inside of the ring for more comfortable wear. Tungsten is extremely hard, will not scratch and will keep its shine forever. Cobalt Free and Hypoallergenic.