Montenegro is about 1.3 times bigger than Lebanon.

Lebanon is approximately 10,400 sq km, while Montenegro is approximately 13,812 sq km, making Montenegro 33% larger than Lebanon. Meanwhile, the population of Lebanon is ~5.3 million people (4.7 million fewer people live in Montenegro).
Tip: This to-scale comparison of Lebanon vs. Montenegro uses the Mercator projection, which distorts the size of regions near the poles.
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