Did up a reference similar to the one I did for Papyrus!

The hard part about drawing Sans, I think, is his eyes. So I took a few sprites and tried to mimic their expressions through the eyes only.

I hope someone can find this useful!

All my art is posted first on my blog! http://faranae.tumblr.com/ (WARNING: Some NSFW content!)
My commission info is here! http://faranae.tumblr.com/commissions