Trace a copy of back and front and alter them as follows:
- raise shoulder tips by 1cm, then extend shoulder lines by 6cm outwards and drap the new shoulder tip by 1cm on back and 2cm on front to have slightly curved shoulder lines
- widen the neckline by 1cm on center back, 1,5cm on shoulders and center front
- widen at side seam all the way 3cm
- drop armhole by 6cm and redraw it.