Buffalo is about 5 times smaller than Warsaw.

Warsaw is approximately 517 sq km, while Buffalo is approximately 105 sq km, making Buffalo 20.22% the size of Warsaw.
Tip: This to-scale comparison of Warsaw vs. Buffalo 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.