San Francisco is about 1.5 times bigger than Glendale.

Glendale is approximately 79 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 53% larger than Glendale.
Tip: This to-scale comparison of Glendale vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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