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According to my calculations the average size of a piece of computer paper is approximately 8.5 inches by 11 inches. best to go to a printer shop, save your image to a disc or sd card, look up the number for a local printer and call to find out how much they will charge, A3 paper will probably be large enough.
Best Answer: if your normal printer paper is size A4 then here are the pixel sizes at a resolution of 72 pixels per inch. 72 pixels per inch is standard as well. Of course, if you want higher quality, you would have more pixels per inch. Hope that helps. That depends on the resolution.