20x20 has an aspect ratio of 1:1. A typical 20x20 frame will cover 1/4 inch of your image all around, resulting in a view window of 19.5x19.5. If you would like a mat to complement your frame, visit our 20x20 Cut Mats. With a mat, a 20x20 frame works best for artwork from 10x10 to 16x16.
Learn more about measuring for a frame