I have a 15 x 15 and I do a lot of 2x and 3x for a portrait photo shop I work with. However they are 8.5 x 11 prints and then we add text on top and bottom so it comes out larger as I use second transfer . He is sponsoring a bowling team and one of the people wears that size. My wife calls it a table cloth. My photo shop owner that I am working with has a vinyl cutter and we are going to try to do the shirts with that for the team.So i will get some experience doing that. He ordered some color vinyl so we are waiting delivery.