Our 14k gold-filled jewelry is bonded with 14k gold and is water and tarnish resistant. 14k gold-filled jewelry is a great alternative to solid gold, and can be worn by people with sensitive skin. - 14k gold-filled- Chain width: 2.5 mm. - Chain length: 16 in. or 16" + 2" extension- Waterproof, Tarnish resistant & Hypoallergenic