Hanoi is about 65 times bigger than Bern.

Bern is approximately 52 sq km, while Hanoi is approximately 3,360 sq km, making Hanoi 6,409% larger than Bern.
Tip: This to-scale comparison of Bern vs. Hanoi 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.