Rome is around the same size as Phoenix.

Phoenix is approximately 1,342 sq km, while Rome is approximately 1,287 sq km, making Rome 95.91% the size of Phoenix.
Tip: This to-scale comparison of Phoenix vs. Rome 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.