Rhode Island is about 2.8 times bigger than Sao Tome and Principe.

Sao Tome and Principe is approximately 964 sq km, while Rhode Island is approximately 2,706 sq km, making Rhode Island 181% larger than Sao Tome and Principe. Meanwhile, the population of Sao Tome and Principe is ~217,164 people (835,403 more people live in Rhode Island).
Tip: This to-scale comparison of Sao Tome and Principe vs. Rhode Island uses the Mercator projection, which distorts the size of regions near the poles.
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