So if anyone’s wondering about legs too, the simplest rule of thumb is that the length from the top of the leg to the knee is equal to the distance between the top of the leg and the bottom of the pectorals:

And I wanna stress that when i say “top of the leg” i’m not talking about the crotch (please don’t flag me tumblr it’s an anatomical term) i’m talking about the point where the femur connects to the pelvis, which is higher up on the hips:

It’s easier to see what I’m talking about in this photo of a man squatting:

So yeah if you use that measurement when using this technique you should get fairly realistically proportioned legs:

But remember! messing with proportions is an important and fun part of character design! Know the rules first so you can then break them however you please!