Wellington is about 2 times smaller than Dallas.

Dallas is approximately 880 sq km, while Wellington (map shows its 57 named neighbourhoods; the area covers the whole city) is approximately 444 sq km, making Wellington 50.48% the size of Dallas.
Tip: This to-scale comparison of Dallas vs. Wellington 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.