I use the leftover pieces when I make a really puffy quilt. I sew 3 sides of the quilt together, turn it right side out and then sew the "columns" down the quilt. I stuff enough batting for 1 row and then sew across. Stuff another row, sew across, and keep going until approximately 8 rows have been sewn. I stuff the last row and hand sew the last side closed. My brother loved his quilt since it was so puffy.