I had always been under the impression that Canada was immensely larger than the U.S., but, according to the CIA World Factbook, Canada's total area is 9.98 million sq. km and the U.S.' is 9.83 million sq. km. If one goes strictly by land area, the U.S. is slightly ahead at 9.16 million sq. km to 9.09 million.
Of course, I have to wonder whether the CIA's measurements might differ from Canada's own, given the U.S.' predilection for sending submarines into water the U.S. calls international that Canada considers its territory.1
And I'm amused by the fact that the CIA uses encrypted communications for all of their web traffic, even to look at their home page.
1 This entry's title is just a Ramones reference for my own entertainment, not an assertion that the CIA is actually up to shenanigans with the Factbook.