South Korea is about 2.5 times smaller than Wyoming.

Wyoming is approximately 251,489 sq km, while South Korea is approximately 99,720 sq km, making South Korea 39.65% the size of Wyoming. Meanwhile, the population of Wyoming is ~563,626 people (51.3 million more people live in South Korea).
Tip: This to-scale comparison of Wyoming vs. South Korea uses the Mercator projection, which distorts the size of regions near the poles.
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