Belgium is about 49 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while Belgium is approximately 30,528 sq km, making Belgium 2.06% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (11.1 million more people live in Belgium).
Tip: This to-scale comparison of Alaska vs. Belgium uses the Mercator projection, which distorts the size of regions near the poles.