There are two Wilton cake tin pieces in this listing. The first is the round insert disc which reads Happy Birthday. It is marked Wilton 1975 Chicago 60643 Made in Korea 503-611. Measures 9 1/2 in diameter and is very shallow. The next piece is the round ring that the disc sets in. (There are several discs available, but this is the only one I have uncovered so far.) The pan is 3 1/2"deep and 10" across. It could not be used without an insert disc and is not solid. It is marked Wilton 1974 Chicago 60643 Made in Korea 502-259. They are aluminum. I have many more Wilton cake tins listed.