San Francisco is about 1.2 times bigger than Red Deer.

Red Deer (map shows its 83 named neighbourhoods; the area covers the whole city) is approximately 105 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 16% larger than Red Deer.
Tip: This to-scale comparison of Red Deer vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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