Trace a copy of back and full front (for the asymmetric neckline), then:
- erase all waist darts
- take in 2cm from center back at waist, 1 from back side seam at waist
- take in 1cm from front side seams at waist – blend to zero at hips and armpit
- taper skirt at knee by taking in 1,5cm from side seams and center back
- flare skirt at hemline by adding 10cm at side seams and 20cm in center back
- add extra length in center back for the train, blend to zero past side seam (see next step).