A standard Pokémon Trading Card Game deck contains 60 cards.
Players build decks from Pokémon cards, Energy cards, and Trainer cards, then use them to battle an opponent. The 60-card deck size applies to the standard constructed format described in the game's basic rules and distinguishes deck construction from booster-pack or collection sizes.
A deck may contain Pokémon of different stages, Energy cards to power attacks, and Trainer cards that support strategy. Except for basic Energy, players generally follow limits on repeated cards with the same name, making both deck size and card selection important.
The 60-card rule is separate from the number of cards in a particular expansion. For example, the original Base Set contained 102 cards, while the game itself uses 60-card decks. Confusing those two numbers is a common beginner mistake.