A round baking dish with shallow slanted sides that are 1 to 1 1/2 inches deep. The pie plate is available in several sizes. The most common sizes being 8, 9 and 10 inch diameters. They can be found made from many different materials, such as aluminum, glass, stoneware, ceramic, and tinned steel. Pie plates are used to bake single crust and double crust pies. They are also available in a deep-dish variety that has slanted sides that are 2 to 2 1/2 inches deep and range from 9 to 11 inches in diameter. The deep-dish pie plate is most often used to bake a savory dish. A pie plate is also referred to as a pie tin.