This has been done to death. And no, to answer your question. If you were to flatten out the mountains, Skyrim is around 20% larger.
Obviously many people still find it interesting enough to talk about. I didn't come in here saying "GUYS, I HAVE A ORIGINAL TOPIC FOR YOU TO DISCUSS!", I came in here to get information. Also, I'm getting many different answers in this thread with no real source either.
Nope, remove it before you get in trouble.
Already have. You're a little slow on the response.