Love drawing figures but have trouble getting all the parts in proper proportion? ME TOO.
So I was thinking about it one day - we learned to write by using that lined paper in kindergarten and first grade that had the blue line where the top of our small letters should be. By writing on that paper over and over, we soon learned how small our small letters should be compared to the big letters.
I figured, if I formatted paper to show the generally accepted 8-heads-tall proportions for a human figure, with lines for the knees, crotch, bellybutton, chest, and head, and drew lots and lots of figures on those lines, pretty soon I'd get it into my thick skull how big proportions SHOULD be.
And it worked! I used it along with the trusty Posemaniacs [link]
app redrawing all the poses from a level standing height (that's important!)
Of course it's just for the 8-head figure and you're limited to eye-level-standing, but for the purpose of the exercise (learning what the proportions look like) it makes for great practice.
It's not hard to set up yourself and you can download and work on the sample above, but I put together a PDF with small, medium, and large formats if you'd like to purchase with a handful of points. Print 'em out and go crazy!