Prague is about 2.4 times bigger than Stockholm.

Stockholm (map shows its 47 named neighbourhoods; the area covers the whole city) is approximately 207 sq km, while Prague is approximately 496 sq km, making Prague 139% larger than Stockholm.
Tip: This to-scale comparison of Stockholm 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.