Christmas Island is about 739 times smaller than South Korea.

South Korea is approximately 99,720 sq km, while Christmas Island is approximately 135 sq km, making Christmas Island 0.14% the size of South Korea. Meanwhile, the population of South Korea is ~51.8 million people (51.8 million fewer people live in Christmas Island).
This to-scale comparison of South Korea vs. Christmas Island uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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