Required: approximately 80 centimeters of stretchy fabric, depending on your measurements.
1. Cut out the pattern in paper.
2. Fold the fabric in half lengthwise.
3. Place patterns A and B against the fabric fold.
Place pattern C on the fabric and cut out all patterns with seam.
4. Stitch the shoulder seams of the front and back pieces with the right sides together.
5. Stitch the front facing and the back facing together.
6. Stitch the sleeves to the front and back.
7. Pin and stitch the seam of the body and sleeves together in one go.
8. Stitch the facing to the neck.
9. Fold the seam of the facing, towards the facing, and topstitch it.
10. Hem the sleeves and bottom.
11. Stitch the facing of the neck.