Costa Rica is about 5 times smaller than Western Sahara.

Western Sahara is approximately 266,000 sq km, while Costa Rica is approximately 51,100 sq km, making Costa Rica 19.21% the size of Western Sahara. Meanwhile, the population of Western Sahara is ~652,271 people (4.6 million more people live in Costa Rica).
This to-scale comparison of Western Sahara vs. Costa Rica uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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