The best way to transfer the colours and details of your favourite photo to wall canvas is to use an image with high resolution. Assuming that the resolution is good, you can pick the right format. Generally speaking, the photo canvases around 11×14 and greater are perfect to hang on the wall. Going a bit more into details, 20×30 and 30×40 photo canvases would look great above a couch, staircase, or on a larger wall. Another rule of thumb when it comes to picking the wall art size, is that the print should take from 55% to 80% of the wall width.