The Topps 2026 Flagship Collection MLB Baseball sealed box from Costco contains standard-sized sports trading cards featuring players from Major League Baseball (MLB). This set includes cards of popular athletes like Shohei Ohtani and represents the New York Yankees team. Manufactured by Topps, the cards are made of high-quality card stock and authenticated by the manufacturer. This collectible box is perfect for fans looking to add to their sports trading card collection, especially those interested in the MLB World Series.