It looks like you're new here. If you want to get involved, click one of these buttons!
Awhile ago there was a leaked video of TESO. I managed to watch it on its original source, youtube, before it was removed. Anyhow, most comments there were hardly anything but slurs and bashing of the game but here on MMORPG.com a lot of comments were about the mapsize, and how tiny it appeared to be.
In light of this I decided to show you an estimate of the mapsize based upon the leaked video and what has been said on TESO's website.
This is the area you are going to spend leveling from level 1 to 50 if you choose the Daggerfall Covenant. The tiny little speck of an island is "Stros M'Kai" which is the starting area where the leaked video was featuring.
And to give you some perspective when comparing it to the whole of Tamriel:
Daggerfall Covenant's Borders: Protected by Breton, Orsimer and Redguard.
High Rock: Under Breton Rule.
Hammerfell: Home to the mighty Alik'r Desert.
Stros M'Kai: The starting area for the Daggerfall Covenant players. This is the map you saw in the leaked video.
Rest of the Map: This is the rest of Tamriel. (disregarding The Shivering Isles)
DISCLAIMER: This may not all be available at launch. Some islands and such might be released as "Adventure Maps" for high level players.
I hope this put all your man worries to rest.
EDIT: This post was moved due to failure with presenting the images which led to confusion.