This traditional herringbone chain necklace is available in 18K white gold filled, 18K yellow filled and 18K rose gold filled. It secures with a lobster clasp. It is waterproof, you can take a bath or swim with it. We have necklaces of 16-inch to 30-inch long and 2mm,3mm,4mm and 5mm wide available for this model. *** Free velvet gift pouch included.