Nice skeleton, unfortunately that was not what was asked for.

Your sprite is roughly 75 pixels long...Well I made it 75 pixels as it was close enough and for a reason you should get here soon.

The recognized realistic human male proportions state the human male is approximately 7.5 heads long and 2 heads wide. Of course we could get into idealistic and heroic proportions, but you stated realism so that is what I aimed for.
Which means for a 75 pixel long sprite we can divide that into 7 and one half sections. Note - I'm using the male proportions because the numbers match better and at this resolution it really doesn't matter.

That means you need to fit the whole skeleton within the bounds of the box I created for the given sprite lengths. Of course you can make it a bit wider/longer/shorter so long as you don't go to far with it.

So build your skeleton in the space provided.



Have fun