Vietnam is about 7 times smaller than Greenland.

Greenland is approximately 2,166,086 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 15.29% the size of Greenland. Meanwhile, the population of Greenland is ~56,831 people (101.5 million more people live in Vietnam).
Tip: This to-scale comparison of Greenland vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles.
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