Auckland is about 24 times bigger than Antwerp.

Antwerp (map shows its 62 named neighbourhoods; the area covers the whole city) is approximately 208 sq km, while Auckland is approximately 4,894 sq km, making Auckland 2,250% larger than Antwerp.
Tip: This to-scale comparison of Antwerp vs. Auckland 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.