Here is a nice unused sample card for Kenner’s 1996 Starting Lineup Cooperstown Collection Baseball set. These kinds of unused cards are also sometimes referred to as proof cards. Proof cards or sample cards served many different design purposes including things like final approval of the packaging or mock-up packaging for presentations. This example came directly from the printing vendor contracted by Kenner, and is the same quality and thickness as the final production cards.
The cards measure 8″ wide by 9″ tall.
Front:
Back:
