Brunei is about 57 times smaller than Vietnam.

Vietnam is approximately 331,210 sq km, while Brunei is approximately 5,765 sq km, making Brunei 1.74% the size of Vietnam. Meanwhile, the population of Vietnam is ~103.8 million people (103.3 million fewer people live in Brunei).
This to-scale comparison of Vietnam vs. Brunei uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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