Long Beach is about 3.9 times smaller than Warsaw.

Warsaw is approximately 517 sq km, while Long Beach is approximately 131 sq km, making Long Beach 25.38% the size of Warsaw.
Tip: This to-scale comparison of Warsaw vs. Long Beach 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.