Hefty high relief medal pendant measures about 1.5" diameter and comes on a continuous 24" chain; no closure. I'm not sure what type of metal it is. I do know that magnets do not stick to the medallion but does to the chain. Please check out my other listings. I have designer purses such as Coach, Kate Spade, and Michael Kors. I have fashion brand purses such as Fossil, Guess, and Vera Bradley. I have plus-size clothing, jewelry, and vintage salt and pepper shakers.