Boston is about 1.5 times bigger than Springfield.

Springfield is approximately 83 sq km, while Boston is approximately 124 sq km, making Boston 50% larger than Springfield.
Tip: This to-scale comparison of Springfield 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.