Choose t-shirts with a coordinating theme or color pattern to give your quilt a consistent appearance. You’ll need between four to thirty-six t-shirts, depending on the organization and size of your quilt. Once you decide which t-shirts to use, start cutting each shirt along the vertical side seams and remove the sleeves. Then position a cardboard square over the part of the shirt you wish to use and cut around the cardboard to help you ensure that all of the t-shirt squares are the same size.