Prague is about 2.2 times bigger than Bucharest.

Bucharest is approximately 226 sq km, while Prague is approximately 496 sq km, making Prague 120% larger than Bucharest.
Tip: This to-scale comparison of Bucharest vs. Prague 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.