Tucson is about 10 times smaller than Shanghai.

Shanghai is approximately 6,341 sq km, while Tucson (map shows its 130 named neighbourhoods; the area covers the whole city) is approximately 627 sq km, making Tucson 9.89% the size of Shanghai.
Tip: This to-scale comparison of Shanghai vs. Tucson 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.