This essential 18K yellow gold filled cable chain necklace is 18 inches long and fastens with a lobster clasp. The chain is approximately 2.4mm wide. / Nickel-free, Lead-free, Tarnish-Resistant / Hypoallergenic / Waterproof, shower with them or take a swim We have 1mm/2mm/2.4mm wide in stock for this model.*** Free Velvet Gift Pouch Included.