Taper from the knee and shorten it to the ankle.

Keep the inseam and the side seam straight.

Draw a parallel line to the waist for the waistband, then on the front draw the yoke.

Square down from the dart apex.

Separate the 3 front pieces.

On waistband and yoke close the darts.

Separate the front in 2 and separate them by 6cm at top and 4cm at bottom.

Mark two pleats at the waist.

Draw the pocket.

This is the finished pattern: back, back waistband, back pocket, front, front pocket and facing, pocket bag, waistband and yoke.