Sweet 16 Keychain hand stamped 1.5" Disk stamped with the text of your choice. 5/8" heart stamped with the name of your choice and includes birthstone charm. Hand stamping jewelry involves a piece of metal, a stamp, a hammer, and me. Please be aware that this is not etched with a machine and there will be variances in spacing, depth and alignment with each letter. I prefer to use stainless steel or aluminum in my designs because they will not rust or tarnish like sterling silver will.