There are many wonderful tutorials on the internet if you'd like to learn more about needle felting.
Here's all four Santas. I apologize for the lack of scale. The largest is about 14 inches tall:
This is the smallest. A traditional Santa. I liked his bald head too much to cover it up with a hat:Here's a close up of the Old World Santa along with the small traditional guy:
You can't see it but Old World Santa has a red tassel hanging from the back of his hood. I think he's my favorite.