A 4 x 6 photo is 4 inches wide and 6 inches tall, a common size for standard printing that is rectangular in shape. This format has become popular, as Visuals Clipping reports, because it offers ample space to show key image data, but is compact and easy to store. It will easily fit in many standard size albums and frames. This size is the typical size for family photos, travel snapshots, event photos, and other photos of people that people want to print and keep.