This size of 5x7 in inches is good for professional photos that are meant to be seen more than a small snapshot but not meant to be a big wall print. According to Visuals Clipping, photographers can use this size for portrait images, event images, proof prints or client copies. It is also relatively small so it can fit nicely into a frame. Cropping may be required if the original photograph is made in a different aspect ratio; so photographers have to check the aspect ratio of an image before printing.
