Detroit is about 2 times bigger than Spokane.

Spokane (map shows its 27 named neighbourhoods; the area covers the whole city) is approximately 178 sq km, while Detroit (map shows its 92 named neighbourhoods; the area covers the whole city) is approximately 359 sq km, making Detroit 102% larger than Spokane.
Tip: This to-scale comparison of Spokane vs. Detroit uses the Mercator projection, which distorts the size of regions near the poles.
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