Key West is about 46 times smaller than Tokyo.

Tokyo is approximately 619 sq km, while Key West (area of Key West island) is approximately 14 sq km, making Key West 2.2% the size of Tokyo.
Tip: This to-scale comparison of Tokyo vs. Key West 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.