Clear front & back. For cards measuring up to 63 mm x 88 mm (2 1/2" x 3 1/2"). This size is typical for trading card games like 'Magic the Gathering', 'Pokémon', and are also found in many newer board games. The cardbox safely stores 50+ sleeved cards, and doubles as a card-holder during play. Just flip back the lid and lock it in place! Contains 50 clear card sleeves in 80µ polypropylene, with a soft non-reflective matte treatment. No acid. No PVC.