One thing that people often worry about how big is a photo 4x6 to show off the details of a picture. Now, it's definitely smaller than something you'd hang on the wall - but as long as you're printing at good resolution, it should do a great job of capturing facial expressions and scene details. Visuals Clipping reckons that 4x6 is perfect for close-up shots, casual portraits and everyday memories - not so much for display prints, but ideal for sharing, collecting and storing moments in a compact, low-maintenance way.