Nigeria is about 13 times bigger than Sierra Leone.

Sierra Leone is approximately 71,740 sq km, while Nigeria is approximately 923,768 sq km, making Nigeria 1,188% larger than Sierra Leone. Meanwhile, the population of Sierra Leone is ~8.7 million people (216.4 million more people live in Nigeria).
This to-scale comparison of Sierra Leone vs. Nigeria uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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