You should be able to print up to a 16x20 with our high quality image files. One thing that consumers, and even photographers don't take into consideration is JPG compression. Any time an image is edited in a program like Photoshop the image is compressed from its original form. Additionally, the camera will store a large amount of data that isn't relevant to the consumer, or the shopping cart, so a lot of this information is stripped. This will again reduce the size of the image. The file size is irrelevant to the quality of the image. The quality of the image is represented by the DPI which is determined by the size image you are to print and the number of pixels available for that image.