It’s not square! No. I did this fun piece along with a class as well, and these are the dimensions she said to use. Being someone who prefers more subdued colors most of the time, I was a bit worried when I saw a class entitled something like “Rainbow Forest,” but I needn’t have worried; the artist provided a color palette that is gorgeous and still a bit rainbow-y. This one was fun and I look forward to using the leaf-making brush again.