This classic 18K white gold filled flat snake chain necklace is 16 inches long and fastens with a lobster clasp. The chain is approximately 2mm wide. This necklace is nickel and lead-free. It is waterproof, so do your daily routine without having to take it off. Shower with them or take a swim. We have 16 inch ~ 38 inch; 18K White Gold/Yellow Gold Filled in stock for this model.*** It is covered under our 60-day 100% money-back guarantee. *** Free gift packaging included. .