When sewing the pieces, pay attention to the notches — they must match.
1. Stitch the darts on the upper back and front pieces. Press towards the center on the back, and downwards on the front.
2. Attach the center front piece to the upper front. Overlock the seam and press downwards.
3. Stitch the darts on the front facing. Press them down. Place the facing and front right sides together and stitch the neckline corner and neckline from the dart upwards, stopping a few centimeters before the shoulder seam. Trim the corner, turn right side out.
4. Stitch the front center seam from the dart downwards. Press open. Stitch the center seam of the facing. Press open.
5. Attach the left side front panel to the center front panel. Overlock and press towards the side. Attach the right side front panel to the center front panel. Overlock and press towards the side.
6. Attach the upper front to the lower skirt panels. Overlock, press upwards, and topstitch.
7. Stitch the center seams of the upper back pieces. Press to the left and overlock.
8. Attach the left side back panel to the center back panel. Overlock and press towards the side. Attach the right side back panel to the center back panel. Overlock and press towards the side.
9. Attach the upper back to the lower skirt panels. Overlock and press upwards.
10. Stitch the left side seam from the zipper mark downwards. Press open, pressing allowances for the zipper slit, and overlock. Place the zipper under the slit and stitch.
11. Stitch the right side seam and shoulder seams. Press shoulder seams open, press the side seam towards the back, and overlock.
12. Stitch the side and shoulder seams of the facings. Press open. Place facings with the garment right sides together and stitch the back neckline and the unfinished section of the front neckline. Finish the armhole in two steps: first the upper edge, then the lower edge. Topstitch the allowance onto the facing 0.2 cm from the seam. Turn the facing to the wrong side and press. Attach the center seam of the facing to the zipper allowance.
13. Press the hem allowance to the wrong side, fold, and topstitch.