San Marino is about 149 times smaller than Puerto Rico.

Puerto Rico is approximately 9,104 sq km, while San Marino is approximately 61 sq km, making San Marino 0.67% the size of Puerto Rico. Meanwhile, the population of Puerto Rico is ~3.1 million people (3.1 million fewer people live in San Marino).
This to-scale comparison of Puerto Rico vs. San Marino uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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