North Korea is about 12 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while North Korea is approximately 120,538 sq km, making North Korea 8.14% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (25.2 million more people live in North Korea).
Tip: This to-scale comparison of Alaska vs. North Korea uses the Mercator projection, which distorts the size of regions near the poles.