Women's 18k Gold Overlay Initial Necklace (18") This petite stainless steel initial necklace features an 18K gold overlay polished finish. The size of the initial pendant is 5/16 inches long by 1/4 inches wide. The 18 inch cable chain style keeps this necklace classy and the high polish finish adds elegance. The 18 inch cable chain necklace has a 2 inch extension and secures with a lobster claw clasp.