What is a Sleeve?
A Sleeve (card protector) is a plastic case in which you slip your individual Pokémon card in order to protect it. The size of an official Pokémon Card Sleeve is 9.2x6.6cm.
Sleeves are essential for keeping your favorite cards in pristine condition and retaining their values. All knowledgeable collectors put their cards in a sleeve before putting it in a binder.
What's in a Pokémon Sleeve Pack?
A pack of Sleeve Pokémon usually contains 64 sleeves . Before abandoning the idea, Pokémon Company also offered Packs of 32 pockets that hardly exist anymore.