This simply design 18K white gold filled herringbone chain necklace is 23.6 inches long and 2mm wide. This necklace is hypoallergenic and waterproof, so you can do your daily routine without having to take it off. 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.