Your artwork needs to be at least 1400 X 1400 and can be as big as 3000 X 3000 as long as the file size is less than 500 kb. In this tutorial we have a square image but its too small. I use a free online tool to make it bigger while staying in spec.
If you get value from the show, please consider giving some back. We will give you a big shout out at the beginning of the next show
