Shanghai is about 30 times bigger than Antwerp.

Antwerp (map shows its 62 named neighbourhoods; the area covers the whole city) is approximately 208 sq km, while Shanghai is approximately 6,341 sq km, making Shanghai 2,945% larger than Antwerp.
Tip: This to-scale comparison of Antwerp vs. Shanghai 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.