1. Insert bag lining into bag body with wrong sides together. Align the side seams, the folded side edges, and the raw top edges; pin.
2. Referring to Diagram 3, topstitch a bag body folded side edge to a bag lining folded side edge, stitching 1/4" from folds. Repeat with remaining folded side edges.
3. Zigzag or serge the raw top edge of bag body to raw top edge of bag lining (Diagram 4). Repeat with remaining raw top edges to make bag.