Assemble Bag Body
1. Fold black-and-white print 21" square in half with right side inside to make a 21x10-1/2" rectangle.
2. Referring to the red broken lines on Diagram 1, sew 4" of each pair of side edges together to make bag body.
3. Clip seam allowances at sewn corners (Diagram 2, left-hand side). Press side seams open; press under seam allowances of unsewn portions of side edges (Diagram 2, right-hand side). Turn bag body right side out.