This is a vintage Corning Ware 1 Quart Casserole Dish in Avocado Green. It is round, made of glass, with a solid pattern. The item diameter is 8 inches. The dish is part of the Corning Ware product line, model P-701-b, and was manufactured in the United States. It features a printed backstamp and is an original piece by CorningWare.