Bakersfield is about 3.2 times bigger than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Bakersfield (map shows its 44 named neighbourhoods; the area covers the whole city) is approximately 389 sq km, making Bakersfield 222% larger than San Francisco.
Tip: This to-scale comparison of San Francisco vs. Bakersfield uses the Mercator projection, which distorts the size of regions near the poles.
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