I use 8.5x11 sized paper. I print through Photoshop and use the "scale to fit media" option. It will downscale it ever so slightly, not enough to notice in my opinion (DVD, Genesis, NES, SNES covers). What kind of cover are you trying to print and what kind of boxes are you using? Universal Boxes are a little larger than Genesis boxes, that's why I ask. I would try printing in Black and White before using color to see if this works for you.