1. Fold bag body in half with right sides and handles together to form a 10-1⁄2×10-1⁄2" square (Diagram 11). Sew side edges together to make bag.
2. To shape bag bottom, at one corner match side seam and bottom center of bag to create a flattened triangle (Diagram 12). Measuring 1" from point of triangle, draw a 1-1⁄2"-long line across triangle. Sew on drawn line. Repeat with remaining corner. Turn right side out to make finish bag.