By selecting Full Color Both Sides, this means that your piece will be printed on both sides in full color (photo quality CMYK printing). 99% of our print orders are printed with the Full Color Both Sides option. If you select Full Color Front and Blank Back, this means that only one side will be full color (photo quality CMYK printing) with the other side being white (raw paper - no ink). In rare cases, you may want to print the same image on both sides. This can be accomplished by selecting Same Image Both Sides. If you are not clear on our color options please contact us at 800.433.9298 so that we can provide you with further information.