This 1998 Don Mattingly 20-card set, manufactured by CMC, is a must-have for any New York Yankees fan. The set comes in a custom binder and includes a talking card. This trading card set features Don Mattingly, a former baseball player who played for the Yankees during the 1988 season. The set includes 20 cards and is a great addition to any sports trading card collection. The card size of this set is a booklet and it belongs to the Major League (MLB) league. The set was manufactured in 1988 and features Don Mattingly, a celebrated player/athlete. The seller has included all important aspects in the description to help buyers make an informed decision. This set will make a great addition to a sports memorabilia collection.