Great rendering studies on the previous page!
Its really good skin coloring practice, I see.
lol at their eyes.
The last proportion study with the picture looks a bit too enlongated, I too have problems with proportions, but I think it's because ideally the human body standing upright is 8 heads tall, but since this guy is spreading the legs and squashing on on side he shouldn't be exactly 8 heads tall, but the proportions should still be there...hmm it's hard to explain D: maybe someone with more knowledge of proportions could come and clarify.
Anyways keep up the great work!