Fiji is about 1.3 times bigger than Montenegro.

Montenegro is approximately 13,812 sq km, while Fiji is approximately 18,274 sq km, making Fiji 32% larger than Montenegro. Meanwhile, the population of Montenegro is ~604,966 people (338,771 more people live in Fiji).
This to-scale comparison of Montenegro vs. Fiji uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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