Kiribati is about 3.3 times smaller than Rhode Island.

Rhode Island is approximately 2,706 sq km, while Kiribati is approximately 811 sq km, making Kiribati 29.97% the size of Rhode Island. Meanwhile, the population of Rhode Island is ~1.1 million people (938,378 fewer people live in Kiribati).
Tip: This to-scale comparison of Rhode Island vs. Kiribati uses the Mercator projection, which distorts the size of regions near the poles.
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