Adjustable sterling silver music ring. Large size: .75" dia. Nominal. Ring size 7-11 Small size: .675" dia. nominal . Ring size 4-7 Value priced custom jewelry cast in sterling silver. Price is determined by the actual weight of the instrument replica. All of our merchandise is of excellent quality and is guaranteed to be .925 Sterling Silver unless otherwise noted. Sterling silver manufacturers use a variety of techniques to minimize tarnishing (such as a rhodium finish), hence finishes may vary. Fine silver (99 pure) is generally too soft for producing large functional objects, and in Sterling the silver is usually alloyed with copper to give strength whilst preserving the ductility of the silver and a high precious metal content. Sterling silver is an alloy of silver containing 92 pure silver and 7 other metals, usually copper. The minimum millesimal fineness is 925.