Niger is about 1.2 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Niger is approximately 1,267,000 sq km, making Niger 85.53% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (23.8 million more people live in Niger).
Tip: This to-scale comparison of Alaska vs. Niger uses the Mercator projection, which distorts the size of regions near the poles.