These replica metal alloy double sided skeleton keys come in sets of 4 styles of keys shown in the photos. Buy more sets and get larger discounts! These keys are fashioned to look like old style antique vintage keys from days gone by. These key sets are great for earrings, jewelry, charms, wedding favors, costumes, scrap booking, etc. They are 2 1/4 inch (60mm) to 2 3/4 inch (70mm) long with an antique gold bronze tone finish.