South Korea is about 3.8 times bigger than Rwanda.

Rwanda is approximately 26,338 sq km, while South Korea is approximately 99,720 sq km, making South Korea 279% larger than Rwanda. Meanwhile, the population of Rwanda is ~14.6 million people (37.1 million more people live in South Korea).
Tip: This to-scale comparison of Rwanda vs. South Korea uses the Mercator projection, which distorts the size of regions near the poles.
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