Write an article based on this "Get a T shirt that is a few sizes too big for you. Figure out how tight you want the shirt to be."
The length of the shirt does not matter because you will be cutting it. The shirt should fit you well in the shoulders, but it needs to be loose in the waist and hips. Measure around your waist, then divide that number by 2. Add 3 inches (7.6 cm) to this new number to make the ties. This will be the new width of your shirt. For example, if you measure your waist and get 28 inches (71 cm):  28 inches (71 cm) divided by 2 = 14 inches (36 cm).  14 inches (36 cm) plus 3 inches (7.6 cm) = 17 inches (43 cm). 17 inches (43 cm) = your new shirt width.