A third of the way through sleeving cards in my new Fellowship of the Ring card game, and it’s a tight fit, but they do fit sleeved (there are 3 slots in the box for 48 cards each). Relieved to have managed the first batch - hands cooperating well there today despite my progressive neurological illness. But definitely leaving the rest to later this week! P.S. You don't have to sleeve the cards, but I prefer to in this case. I'm using Gamegenic 66 x 91 mm "Gray" code Standard Card Game Matte Sleeves (3 x 50 packs). But there are other options too.