Seoul is about 7 times bigger than Zurich.

Zurich is approximately 88 sq km, while Seoul is approximately 605 sq km, making Seoul 589% larger than Zurich.
Tip: This to-scale comparison of Zurich vs. Seoul 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.