Slovakia is about 2.9 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Slovakia is approximately 49,035 sq km, making Slovakia 34.06% the size of Illinois. Meanwhile, the population of Illinois is ~12.8 million people (7.4 million fewer people live in Slovakia).
This to-scale comparison of Illinois vs. Slovakia uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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