This stackable birthstone circle charm necklace can be personalized with one birthstone charm all the way up to fourteen separate birthstone charms. The eternity birthstone charms are created with the twelve birthstones, in colorful cubic zirconia stones. Each one measures 1/2" and is .25 carats. A way to add beautiful meaning into the stackable birthstone necklace is to add the birthstone of all the children or grandchildren of a women in your life. With a necklace that this customized with the birthstones of everyone she loves, she will remember how much everyone cares and loves her. The Stackable Custom Birthstone Charm Necklace is Rhodium plated and the charms are placed on a 16 inch chain, with a 3 inch extender for a comfortable fit.