Miami is about 2.4 times smaller than Dusseldorf.

Dusseldorf is approximately 217 sq km, while Miami is approximately 92 sq km, making Miami 42.5% the size of Dusseldorf.
Tip: This to-scale comparison of Dusseldorf vs. Miami 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.