Vietnam is about 1.9 times bigger than Oklahoma.

Oklahoma is approximately 177,847 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 86% larger than Oklahoma. Meanwhile, the population of Oklahoma is ~3.8 million people (100.1 million more people live in Vietnam).
This to-scale comparison of Oklahoma vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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