Double Heart Initial Necklace. Each letter measures approximately 1/2 inches long and 1/2 inches wide, and each heart measures 1/4 inch. Every necklace comes with an 18 inch silver overlay cable chain with a two inch extender and a lobster-claw clasp. Necklace is crafted in silver overlay and is 100% hypoallergenic. It comes packaged in a light pink organza pouch.