Knowing the size of 5x7 in inches is helpful when selecting a photo for a greeting card or custom card. The print is 5 x 7 inches, perfect for bigger folded cards and keepsake prints. The size of the photo, adhesive, and photo frame, however, should fit within the interior of the card, so it is advisable to measure the space and determine if the photo will go on the exterior or the inside of the frame, Visuals Clipping recommends. This easy test will prevent getting the paper awkwardly folded or cut off.