After deciding what I wanted to make, I made a quick visit to goodwill, which happens to have aisles and aisles of untouched oversized mens shirt. I chose the two below for their pattern, size, and color. I tried both shirts on and marked with pencil where the darts should be for the best fit, mostly through trial and error! I determined that if the back section was 15'' wide and the front section taken in by 3'' the shirt fit the best. I also marked the sleeve length I wanted. I was very careful to make marks perfectly symmetrical via use of a tape measurer.