9MM Silicone Rubber Wedding Bands for Men and Women Ring Silicone rings are a safe and easy alternative to a metal wedding band. Silicone is tough enough for every day use but will also give way and break under extreme pressure. Excellent for machinists, sheet metal workers, carpenters or any of the trades that use their hands and tools a lot. Available in sizes 7 8 9 10 11 12 13