Dublin is about 11 times smaller than Rome.

Rome is approximately 1,287 sq km, while Dublin is approximately 118 sq km, making Dublin 9.15% the size of Rome.
Tip: This to-scale comparison of Rome vs. Dublin 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.