Sierra Leone is about 276 times bigger than Niue.

Niue is approximately 260 sq km, while Sierra Leone is approximately 71,740 sq km, making Sierra Leone 27,492% larger than Niue. Meanwhile, the population of Niue is ~1,933 people (8.8 million more people live in Sierra Leone).
Tip: This to-scale comparison of Niue vs. Sierra Leone uses the Mercator projection, which distorts the size of regions near the poles.
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