Transparent pockets for photo albums, Papero amo, Scrapbook Pockets - It seems like a science, but just remember one main rule...get the size right! Depending on the type of album, you can only filter pockets that fit into yours. The largest (and classic) size is 12x12 inches (pocket size 30.5x30.5cm) and is used for large scrapbook pages and pocket Project life pages. In addition to this square format, you can also try an 8.5x11 inch rectangle. For mini-albums, we have pockets of sizes 15x20cm (6x8"), 10x15cm (6x4") and 10x10cm (4x4").