This heart necklace is available in 5 different color options. The locket measures 0.6 inches and is made of 18k gold vermeil and the colors are hand painted with enamel. The gold-filled chain is adjustable to 16-18 inches. As always, this heart necklace locket is made to last for a lifetime of love. It can be opened to store a mini photo or anything else you need to hold close.