Rome is about 13 times smaller than Beijing.

Beijing is approximately 16,411 sq km, while Rome is approximately 1,287 sq km, making Rome 7.84% the size of Beijing.
Tip: This to-scale comparison of Beijing 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.