How may cards are in are Yu-Gi-Oh deck?
The absolute MINIMUM amount of cards you can have in a Deck is 40 cards. Normally, for casual play, there is no "maximum" limit for the amount of cards you can have in your Deck. However, for most official Duels and tournaments, it is restricted to 60 cards MAXIMUM per the newly instituted Master Rules.Also, you can have a MAXIMUM of 15 cards in your Extra Deck. There is no "minimum" requirement of the amount of cards in your Extra Deck.For your Side Deck, you must have 15 cards. You can choose not to have a Side Deck; however, if you do, you can have no more, and no less than 15 cards.