Iran is about 286 times bigger than Brunei.

Brunei is approximately 5,765 sq km, while Iran is approximately 1,648,195 sq km, making Iran 28,490% larger than Brunei. Meanwhile, the population of Brunei is ~478,054 people (86.3 million more people live in Iran).
This to-scale comparison of Brunei vs. Iran uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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