The pattern --http://www.ravelry.com/patterns/library/circus-mouse-clown -- is by my crochet friend and talented designer Carrey Rey, known as MixedKreations on Ravelry.
I don't make many amigurumi -- this is actually only my second one -- but as I was crocheting this guy, I could really see the appeal of amiguruming.
The head is a bit bigger than the pattern because I wanted to use a chenille yarn in my stash, and it was chunky, not worsted. The hat is a bit smaller because I accidentally picked up the wrong hook.
Luckily, my little guy didn't seem to suffer at all from my Wrong Yarn/Wrong Hook choices.