Draw a basic torso shape as the jacket’s outline
Add shoulder lines extending slightly beyond the torso
Sketch the collar or neckline
Draw the front opening line down the center
Add sleeves on both sides
Shape the cuffs at the ends of the sleeves
Define the waist and hem
Add lapels or hood if needed
Draw pockets on the front
Add buttons, zipper, or other fasteners
Refine the seams and stitching lines
Erase extra guide lines
Darken the final jacket outline
Add folds and wrinkles for realism