Illinois is about 25 times bigger than Brunei.

Brunei is approximately 5,765 sq km, while Illinois is approximately 143,961 sq km, making Illinois 2,397% larger than Brunei. Meanwhile, the population of Brunei is ~478,054 people (12.4 million more people live in Illinois).
This to-scale comparison of Brunei vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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