Northern Mariana Islands is about 22 times bigger than Nauru.

Nauru is approximately 21 sq km, while Northern Mariana Islands is approximately 464 sq km, making Northern Mariana Islands 2,110% larger than Nauru. Meanwhile, the population of Nauru is ~9,811 people (41,664 more people live in Northern Mariana Islands).
Tip: This to-scale comparison of Nauru vs. Northern Mariana Islands uses the Mercator projection, which distorts the size of regions near the poles.
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