How large is the tallest building in the world?

The name of the tallest man-man structural building in the world is called the Burj Khalfia which stands at an estimated 830 meters or 2,722 feet. It is located in Dubai, United Arab Emirates (I think thats the exact location). The building was opened or completed five years ago. 

To make it more clear of what it is, its a really tall glass building with a lot of floors. It was actually made in the movie "Mission Impossible: Ghost Protocol"(entertaining movie) that featured the American actor Tom Cruise. This was actually how I first knew about the building ;-P