A baking pan is a flat, rectangular or round container used for baking. It is typically made of metal, such as aluminum or steel, and can come in a variety of sizes. The two most common types of baking pans are SHEET pans, which have five letters, and TIN pans, which have three letters. SHEET pans are usually shallow and have a lip around the edge, while TIN pans are deeper and have no lip. Both types of pans are used for baking cakes, cookies, breads, and other baked goods.