The beautiful heart-key locket has a glass center and opens up to allow charms to be put into them. Simply choose the charms that are a few of your favorite things and insert them into your heart. From good luck charms, initials, birthstones to religious symbols, they will represent what is important to you. The locket is easy to open and close and stays securely closed with internal clips and magnets. You will be able to change charms as easily as changing your necklace. The heart measures 20mm across and the heart-key is 45mm long. The necklace measures up to 16 inches with a 2 inch extender and is detachable from the locket. It has a lobster claw clip so you can adjust it to your desired length. The necklace is a link type chain. To make a complete Heart Locket, choose your base (bracelet, necklace, key chain or key clip), and then choose the charms that you want. Open your heart and add the charms to the locket. You are done and ready to wear you new heart locket jewelry necklace!