Hey there! Nice mannequin construction! :D But the proportions and perspective are off. The heads are too small, while the necks are a bit too elongated. The arms are a bit too long as well. When drawing a figure in perspective, follow the direction of the form to draw the volume better (like the legs). There's a simple rule called "the rule of thirds". Which consist in divide the torso into three equal parts. One is from the top of the head to the neck, the second one is the rib cage, and the third one is the abdomen and pelvis. This way, you ensure you don't draw small heads or long necks. Whether the figure stretches, bends, or twists, the bone structure remains the same and therefore the proportions do not change. In perspective, keep in mind which figure overlaps the other, but also make sure to draw the torso clearly, since in the figure on the right, it appears as if there is no abdomen, as the rib cage is connected directly to the pelvis. Hope this helps!
