Paris is about 2 times smaller than Riverside.

Riverside is approximately 210 sq km, while Paris is approximately 105 sq km, making Paris 50.15% the size of Riverside.
Tip: This to-scale comparison of Riverside vs. Paris 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.