Guinea is about 1.4 times smaller than Vietnam.

Vietnam is approximately 331,210 sq km, while Guinea is approximately 245,857 sq km, making Guinea 74.23% the size of Vietnam. Meanwhile, the population of Vietnam is ~101.6 million people (86.5 million fewer people live in Guinea).
Tip: This to-scale comparison of Vietnam vs. Guinea uses the Mercator projection, which distorts the size of regions near the poles.
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