From publisher blurb: 54 creatures on 54 cards! Plus a cover/checklist card and license info cards. Note: The print-it-yourself PDF file is set up to print duplex on a printer. The upper right card front on page one is matches the upper left card back on page two and so on. The corners of each card have lines on the edges to help you trim them down to standard 2.5'x3.5' cards.