"Why doesn't this 8x10 look like the proof I got?" It's a very common question, along with others like "why did this enlargement come out blurry". Both questions have simple, but different answers. An 8x10 looks different from a proof (generally in 4x6 size) because the ratio is different. An enlargement often comes out blurry because the original did not contain enough data to be enlarged.
So how do you figure out all these different issues? Check out our tips and explanations of all things print size related. We'll even show you how big your prints would look hung on your wall.
Information source-
http://photography.about.com/b/2011/02/14/photo-print-sizes.htm