Boston is about 2.3 times smaller than Fort Wayne.

Fort Wayne (map shows its 315 named neighbourhoods; the area covers the whole city) is approximately 289 sq km, while Boston is approximately 124 sq km, making Boston 42.84% the size of Fort Wayne.
Tip: This to-scale comparison of Fort Wayne 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.