I received my Premier Bakeware Half Sheet Pan a few days ago. It is 13 x 18 inches big. It is a great pan. It is ceramic nonstick. I made maple bacon chocolate chip cookies on it and they slid right off the pan. After cooking with it I washed it with warm soapy water and it came out spotless.  I would definitely say that this is the nicest pan I have had to bake on.