Is this your first ring or do you already have a silicone ring? Silicone has a little give to it (not much really) whereas metal has NO give to it. If properly sized, either material can perform fine as a cock ring, so if it will be your first non-stretchy ring, I'd say stick with silicone as it is less expensive and you can check sizing and determine if you like that type of ring. If you already have a silicone ring and it works for you, I am not sure a metal ring will do much more for you, but the metal rings normally look great when they are in place. Metal is the choice to make if you want a ring that looks attractive. less