When I QAYG -- I layer a center piece with like batting(same size) ;; cut backing 2" wider all around. Center top and batting in the backing square; quilt--- Place each square back to back(right sides together) and sew along the center square. When opened up; I just roll each 2"backing over the top square to make a sashing. Sew it down. do likewise with the rest until you have a row. etc.