Seattle is around the same size as Dusseldorf.

Dusseldorf is approximately 217 sq km, while Seattle is approximately 217 sq km, making Seattle 99.95% the size of Dusseldorf.
Tip: This to-scale comparison of Dusseldorf vs. Seattle uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.