New Haven is about 18 times smaller than Dallas.

Dallas is approximately 880 sq km, while New Haven is approximately 48 sq km, making New Haven 5.5% the size of Dallas.
Tip: This to-scale comparison of Dallas vs. New Haven 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.