Our printers can achieve 300 DPI, so images near or above 300 DPI (5 stars) will come out very much like the images on your screen.
Images lower than 300 DPI (4 stars or less).... not so much. The lower the DPI below 300, the more pixelation and distortion you will get on your wallet.
Below 72 DPI (0 stars) is definitely not the way you want to express yourself on your wallet, believe us.