I get asked this a lot. When printing your photos we have to keep Aspect Ratio in mind.
What is Aspect Ratio? "Aspect ratio is the term used to describe the dimensions of an image by comparing the width to the height and expressing it in ratio form." Andrew S. Gibson.
What Does This Mean For You?
Take notice of how each photo gets Cropped.
4 x 6
5 x 7
8 x 10
11 x 14
12 x 12