The 1989 Upper Deck Star Rookie Ken Griffey Jr #1 trading card is a highly sought-after collectible featuring the legendary baseball player in his early career. This original card is made of card stock with a thickness of 20 PT, showcasing Griffey Jr during his time with the Seattle Mariners in Major League Baseball. As part of the base set and designated as a rookie card, this piece is a valuable addition for fans and collectors looking to own a piece of baseball history from 1989.