Papua New Guinea is about 4.5 times bigger than Kentucky.

Kentucky is approximately 102,896 sq km, while Papua New Guinea is approximately 462,840 sq km, making Papua New Guinea 350% larger than Kentucky. Meanwhile, the population of Kentucky is ~4.3 million people (5.3 million more people live in Papua New Guinea).
This to-scale comparison of Kentucky vs. Papua New Guinea uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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