This is especially true with the pockets. Stuffing your hands inside can stretch them out. The result is a slightly dilapidated-looking suit. Sewing pockets shut keeps suits looking fresh.
Start with the two 4 x 9-inch pocket pieces. Fold in half lengthwise and top stitch along the fold with a sewing machine. Repeat for both pieces. Lay the sewed pocket piece on top of the lining piece.