6-Handed 500 deck consists of 63 cards so what we did is had US playing Card just make the extra cards needed to play the game over and above the standard 52 card deck with jokers. So the extra cards needed are 4-11’s each suit, 4- 12’s each suit and 2 –13’s red suits. We are calling these the Add-on Packet so when you see the prices, it does not confuse you. The Backs of these cards are normal 808 rider back in Blue, what this means is if you buy the Add-on cards by themselves, you will need to purchase the Rider back 808 deck yourself. The Add-on’s are pre packaged cellophane in sets of 5 so that is the cheapest way to purchase them, the single Add-on will ship in resealable sleeves.