Pasadena is about 107 times smaller than Shanghai.

Shanghai is approximately 6,341 sq km, while Pasadena is approximately 59 sq km, making Pasadena 0.94% the size of Shanghai.
Tip: This to-scale comparison of Shanghai vs. Pasadena 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.