Kalamazoo is about 1.9 times smaller than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Kalamazoo is approximately 64 sq km, making Kalamazoo 52.74% the size of San Francisco.
Tip: This to-scale comparison of San Francisco vs. Kalamazoo uses the Mercator projection, which distorts the size of regions near the poles.
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