Wellington is about 2.9 times smaller than Rome.

Rome is approximately 1,287 sq km, while Wellington (map shows its 57 named neighbourhoods; the area covers the whole city) is approximately 444 sq km, making Wellington 34.49% the size of Rome.
Tip: This to-scale comparison of Rome vs. Wellington 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.