South Korea is about 242 times bigger than Heard Island and McDonald Islands.

Heard Island and McDonald Islands is approximately 412 sq km, while South Korea is approximately 99,720 sq km, making South Korea 24,104% larger than Heard Island and McDonald Islands.
This to-scale comparison of Heard Island and McDonald Islands vs. South Korea uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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