Boston is about 2.6 times bigger than New Haven.

New Haven is approximately 48 sq km, while Boston is approximately 124 sq km, making Boston 156% larger than New Haven.
Tip: This to-scale comparison of New Haven vs. Boston 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.