If you've seen "The Lord of the Rings" trilogy, you've spent a lot of time in Middle-earth (over 11 hours if you're watching the extended versions). But even after all that there still might be some things you don't know about the different types of folk who live there.

So before you check out "The Hobbit: An Unexpected Journey" when it comes to digital download on March 12 and DVD/Blu-ray on March 19, delve into this exclusive infographic that breaks down the differences between Hobbits, Dwarves and Elves.

Watch the cast of 'The Hobbit: An Unexpected Journey' talk to Yahoo! Movies: