Mauritania is about 1,895 times bigger than Guam.

Guam is approximately 544 sq km, while Mauritania is approximately 1,030,700 sq km, making Mauritania 189,367% larger than Guam. Meanwhile, the population of Guam is ~168,999 people (5.1 million more people live in Mauritania).
Tip: This to-scale comparison of Guam vs. Mauritania uses the Mercator projection, which distorts the size of regions near the poles.
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