The product is a 1987 Topps Tiffany Mark McGwire #366 Rookie trading card featuring the player during his time with the Oakland Athletics. This card is graded as SGC 9, indicating it has received a high quality grade. It is a standard size card made of card stock with a thickness of 20 Pt. This collectible item is a part of the original 1987 Topps Tiffany set and is a valuable piece for fans of Major League Baseball and sports trading cards.