Nauru is about 91 times smaller than Virgin Islands.

Virgin Islands is approximately 1,910 sq km, while Nauru is approximately 21 sq km, making Nauru 1.1% the size of Virgin Islands. Meanwhile, the population of Virgin Islands is ~105,413 people (95,602 fewer people live in Nauru).
Tip: This to-scale comparison of Virgin Islands vs. Nauru uses the Mercator projection, which distorts the size of regions near the poles.
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