Vietnam is about 2.8 times smaller than Nigeria.

Nigeria is approximately 923,768 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 35.85% the size of Nigeria. Meanwhile, the population of Nigeria is ~225.1 million people (121.3 million fewer people live in Vietnam).
This to-scale comparison of Nigeria vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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