Vietnam is around the same size as Oman.

Oman is approximately 309,500 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 7% larger than Oman. Meanwhile, the population of Oman is ~3.8 million people (100.0 million more people live in Vietnam).
This to-scale comparison of Oman vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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