Single welt pocket
For a single welt pocket, you will need a welt piece, a facing piece and two pocket pieces. The welt strip should be three times as wide and 1 1/4" (3 cm) longer than pocket opening. The facing piece should be twice as wide as the pocket opening and 1 1/4" (3 cm) longer. One of the pocket pieces should be cut from lining fabric. Interface the facing piece. Transfer all pocket markings to the welt, facing, pocket and garment pieces. With right sides together, fold the welt piece in half lengthwise. Stitch across the narrow ends along the seamline. Trim the seam allowance, clip the corners, turn right side out and press. Baste the raw edges together. On the right side of the garment, position the welt with the raw edges aligned with the centre of the pocket opening and the folded edge extending beyond the bottom of the pocket opening. Pin and baste in place along bottom line of pocket opening. Place facing piece, right side face down over pocket opening area. Stitch along marked opening lines being careful not to touch top and side edges of welt in seam. Cut along centre of pocket opening, ending 1/4" (7 mm) from ends, being careful not to cut through welt strip. Turn raw edges to inside with welt strip centre in opening. Fold back the garment to expose the seam allowance at the upper edge of the pocket opening. Matching raw edges and with right sides together, centre one pocket lining piece over the seam allowance. Sew in place. Repeat for second pocket lining piece and bottom seam allowance of pocket opening. Fold top lining piece downward over bottom lining piece. Pin sides and bottom of pocket. From right side of garment, fold back garment sides to expose small triangular pieces and welt of pocket. Stitch along pocket side seamlines, catching small triangles in seam. Stitch across bottom of pocket. Trim seam allowance and clean-finish pocket edges. From right side of garment, hand or machine stitch side edges of welt to side edges of pocket opening.