Sierra Leone is about 137 times smaller than United States.

United States is approximately 9,833,517 sq km, while Sierra Leone is approximately 71,740 sq km, making Sierra Leone 0.73% the size of United States. Meanwhile, the population of United States is ~337.3 million people (328.6 million fewer people live in Sierra Leone).
This to-scale comparison of United States vs. Sierra Leone uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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