Holy See (Vatican City) is about 139 times smaller than San Marino.

San Marino is approximately 61 sq km, while Holy See (Vatican City) is approximately 0 sq km, making Holy See (Vatican City) 0.72% the size of San Marino. Meanwhile, the population of San Marino is ~34,682 people (33,682 fewer people live in Holy See (Vatican City)).
This to-scale comparison of San Marino vs. Holy See (Vatican City) uses the Mercator projection, which distorts the size of regions near the poles. Learn more.

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