North Korea is about 4.3 times smaller than Thailand.

Thailand is approximately 513,120 sq km, while North Korea is approximately 120,538 sq km, making North Korea 23.49% the size of Thailand. Meanwhile, the population of Thailand is ~71.6 million people (45.0 million fewer people live in North Korea).
Tip: This to-scale comparison of Thailand vs. North Korea uses the Mercator projection, which distorts the size of regions near the poles.
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