This is a vintage Wilton Cake Pan, Big Bird Face 502 7409 Muppets from 1971. It is aluminum. It is 11-1/2" long and 12" wide. It is pre-owned and its condition is consistent with ordinary use. There are some light scratches and very shallow dents.
It makes a very cute cake. Uses a two layer cake mix. The original instruction insert is not available, however, I have instructions from the Internet.
This vintage cake pan does not come with the plastic beak or eyes. But instructions tell how to do this area with icing.