925 Sterling Silver Large Star Diameter 7 mm Small Star Diameter 5 mm Rowed Star Length 4 cm Additional Extension Chain 5 cm Instructions for Use: Avoid contact of your silver products with perfume-soap-deodorant and other chemicals. When your silver products darken, use a silver polishing cloth or a damp cloth. We recommend that you wipe it with a cloth. When you are not using your products, keep them in a closed box away from light and air. Protect the surface of your products from scratching.