Colorado is about 4,404 times bigger than San Marino.

San Marino is approximately 61 sq km, while Colorado is approximately 268,627 sq km, making Colorado 440,272% larger than San Marino. Meanwhile, the population of San Marino is ~34,682 people (5.0 million more people live in Colorado).
This to-scale comparison of San Marino vs. Colorado uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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