Size comparison

compared to

San Francisco is about 6,269 times bigger than Colosseum.

Colosseum is approximately 0.019 km² (0.0075 sq mi), while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 626,843% larger than Colosseum.
Tip: This to-scale comparison of Colosseum vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Francisco vs. Colosseum

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