This traditional wave chain necklace features a shiny 925 sterling silver design. It is secured with a lobster clasp. This necklace is nickel-free and lead-free. It is waterproof. You can take a bath or swim with it. We have necklaces from 15 inches to 20 inches long and 1. 5 mm wide to meet the needs of different customers. *** Free Gift Packaging Included.