The inside of the cups are'mother of pearl' The entire cups has a opalescent luster finish. Cups are 3.5" OD and the saucers are 5 3/4" OD. This item is in the category "Collectibles\Kitchen & Home\Dinnerware & Serveware\Cups & Saucers". The seller is "thompsonandcrowe" and is located in this country: US. This item can be shipped to United States.