humans are not symetrical robots

You may use simple shapes to get the proportions of a figure, but be careful not to get hung up in making perfectly even rectangles. As stated in the previous post about contraposto, people tend to favor one side, and not put equal weight on both sides. This might shift back and forth, but whatever the pose you are drawing, look for how the figure is leaning (how the head, shoulders, hips are tilted).





in this simplifed rectange version of the drawing above, the important measurements are the width of the shoulders and length of the ribcage (to form the largest rectangle you see), the height and width of the head, the width of the pelvis (hips).