Potsdam is around the same size as Spokane.

Spokane (map shows its 27 named neighbourhoods; the area covers the whole city) is approximately 178 sq km, while Potsdam is approximately 188 sq km, making Potsdam 6% larger than Spokane.
Tip: This to-scale comparison of Spokane vs. Potsdam uses the Mercator projection, which distorts the size of regions near the poles.
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