For cards measuring up to 70X70mm (23/4 x 23/4?). This card size became popular in the ?Power Grid?/?Funkenschlag? game family but are also found in many other games like the various ?Catan Card Games? and the ?King of Tokyo? expansions. 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 80? polypropylene with a soft non-reflective matte treatment.