The 1991 Fleer #337 Calvin Williams Football Card is a standard-sized trading card featuring the NFL player Calvin Williams from the Philadelphia Eagles. Manufactured by Fleer in 1991, the card is made of card stock and is an original from the Fleer set. This vintage-style sports trading card is a base set card with a 20 Pt. thickness, perfect for any football card collector looking to add a piece of NFL history to their collection.