Miami is about 1.3 times smaller than Grand Rapids.

Grand Rapids is approximately 116 sq km, while Miami is approximately 92 sq km, making Miami 79.68% the size of Grand Rapids.
Tip: This to-scale comparison of Grand Rapids 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.