Metals: 14k Gold Filled, Rose Gold or Sterling Silver Sizes: 8mm, 15mm, and 35mm lengths Wire: Square, 22 gauge Gold filled jewelry is more economical than solid gold but still a beautiful, durable option. Standardized to be at least 5% gold, bonded to the outside of the piece, this is a much more durable option to gold plated jewelry which can be only the thickness of one molecule. The thick layer of gold won’t tarnish (turn colors) and will not rub or flake off. Wearers who are sensitive to certain metals can wear gold filled without worries of an allergic reaction. Gold filled accessories can be worn even daily without fear of fading or rubbing off for many cases as long as 30 years. Taking your jewelry off before bathing or sleeping will extend the life of your jewelry.