HERE is something really fun. I always liked size-charts, and always wanted to do one. So, because I'm on vacation, without internet (but equipped with lots of old cartoons) I watched a ton of old Cartoon Network shows.
Here's what I believe the size-ratio for a bunch of Cartoon-Cartoon characters is. It's NOT complete. I'm going to continue adding on to it, and hope to get a ton of suggestions from you so I can keep improving it! Have fun checking it out!
I'm doing a Nicktoons one as well... for good measure!
Updated: Aug. 6 2010 - but not complete... yet!