Guinea is about 1.2 times bigger than Utah.

Utah is approximately 212,751 sq km, while Guinea is approximately 245,857 sq km, making Guinea 16% larger than Utah. Meanwhile, the population of Utah is ~2.8 million people (10.5 million more people live in Guinea).
This to-scale comparison of Utah vs. Guinea uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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