Maximum Deck size Yu Gi Oh! Wiki Fandom What Size Are Yu Gi Oh! Cards? Your Playmat Amazon.com: Complete Custom Deck for Yugioh Goat Format Structure Deck Classic Competitive Build Retro : Toys & Games Did you know the real reason why Yu Gi Oh decks have a 60 card limit? We have one player to thank for it! Here's the story. Did you know the real reason why Yu Gi Oh decks have a 60 card limit? We have one player to thank for it! Here's the story. What's the best deck size for heroes: 40 or 60 cards?