Paris is about 1.3 times smaller than Kaiserslautern.

Kaiserslautern is approximately 140 sq km, while Paris is approximately 105 sq km, making Paris 75.45% the size of Kaiserslautern.
Tip: This to-scale comparison of Kaiserslautern 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.