Vietnam is about 14 times bigger than Djibouti.

Djibouti is approximately 23,200 sq km, while Vietnam is approximately 331,210 sq km, making Vietnam 1,328% larger than Djibouti. Meanwhile, the population of Djibouti is ~1.2 million people (100.4 million more people live in Vietnam).
Tip: This to-scale comparison of Djibouti vs. Vietnam uses the Mercator projection, which distorts the size of regions near the poles.
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