Start by drafting a bodice block to hipline with 10cm ease at bust circ, 7cm ease at waist and 5cm ease at hips.
You can learn our method for drafting perfectly made to measure basic blocks, for fitting and manipulating them in our basic blocks course/module 1.

On front:

• measure distance from center front to bust point, then draw a line from center front outwards 8cm above hipline, matching measurement to previous one (see the red lines here). This will be the outermost point of jacket hemline
• connect this point to high shoulder point
• then draw the hemline with a slanted line from previous point to 3 to 4cm before center front and 2cm below hipline, then from this bottom point to side seam 3cm above hip

On back:

• draw hemline as a horizontal line matching level to front side seam.

Get back and:

• reduce waist dart by 0,7cm and discard this ampunt from center back at waist, blending to zzero at shoulder blades level and hip level
• draw the princess cut starting from dart at waist and ending at armhole 7 to 8cm above armpit level. The curve should be quite flat and the new curved dart should have similar length to the original one.

Trace center back and side back panel separate, then mark grainline on both of them perpendicular to waistline.

Now get front:

• draw the princess cut starting from bust point and ending at armhole at matching level to back (7 to 8cm above armpit)
• cut through this curved line and tape shoulder dart separate
• then lengthen waistline measuring from center front outwards as front waistline minus dart width (see the colored sections highlighted. Draw a parallel line 2cm above waist and another one 2cm below it to identify the belt. Notice that belt ends at an angle at jacket edge.