Oklahoma is about 2.3 times bigger than Serbia.

Serbia is approximately 77,474 sq km, while Oklahoma is approximately 177,847 sq km, making Oklahoma 130% larger than Serbia. Meanwhile, the population of Serbia is ~6.7 million people (3.0 million fewer people live in Oklahoma).
This to-scale comparison of Serbia vs. Oklahoma uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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