Made of clear, 100 micron-thick, non-PVC, acid-free polypropylene plastic. Difficult to tear or crease, and free of chemicals that will corrode the cards within the sleeves. Designed to fit cards snugly, making shuffling and handling easy. Fits Cards of This Size: 2 1/2'' x 3 1/2'' (63.5 x 88 MM) - Fits most trading card games. Includes 50 sleeves.