Country size comparison
compared to
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 ~57,792 people (103.8 million more people live in Vietnam).
Compare further: Vietnam vs. Greenland