You can print a 4x6 photo on any photo paper that your printer is compatible with, but whether it's good quality or not is a whole different story. When people ask "how big is a photo 4x6" - well it's just 4 by 6 inches - but the quality of the paper you choose can really make a big difference. On Visuals Clipping you'll find a load of information about the different types of paper finishes, thicknesses and how they affect things like texture and colour tone. Choosing the right paper will make a big difference to how your 4x6 prints turn out.