Oct 24, 2012 · Cut out a 13' x 13' square from each of your fabrics, so you will have two squares. 2. Pin your fabrics right sides together. 3. Once you have your fabrics pinned you can sew around the square with a 1/2" seam allowance, leaving a 1"-1 1/2" opening on one of the sides (so you can turn it right side out).