Burundi is about 53 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Burundi is approximately 27,830 sq km, making Burundi 1.88% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (12.0 million more people live in Burundi).
Tip: This to-scale comparison of Alaska vs. Burundi uses the Mercator projection, which distorts the size of regions near the poles.