Puerto Rico is about 149 times bigger than San Marino.

San Marino is approximately 61 sq km, while Puerto Rico is approximately 9,104 sq km, making Puerto Rico 14,825% larger than San Marino. Meanwhile, the population of San Marino is ~34,682 people (3.1 million more people live in Puerto Rico).
This to-scale comparison of San Marino vs. Puerto Rico uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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