Amsterdam is about 1.9 times smaller than Bremen.

Bremen is approximately 318 sq km, while Amsterdam is approximately 166 sq km, making Amsterdam 52.15% the size of Bremen.
Tip: This to-scale comparison of Bremen vs. Amsterdam 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.