Irvine is about 1.6 times bigger than Paris.

Paris is approximately 105 sq km, while Irvine (map shows its 24 named neighbourhoods; the area covers the whole city) is approximately 170 sq km, making Irvine 61% larger than Paris.
Tip: This to-scale comparison of Paris vs. Irvine 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.