There's two different pocket sizes of A4 1 page. Sell sheets fit in the larger one (that is, no pocket shortening at the bottom) but the Inkworks uncut 9 card sheets do not because the border makes them too big. Make sure you measure what you want to put in and check the sheet pocket size measurements. For larger cards that do not fit, I have put them in comics bags (which come in all sorts of sizes) and then put the bagged card inside a standard stationary A4 plastic sleeve for a binder. The reason you need the comic bag is because the stationary sleeves are not archive safe.