Bremen is about 3.8 times smaller than Los Angeles.

Los Angeles (including the city proper only) is approximately 1,215 sq km, while Bremen is approximately 318 sq km, making Bremen 26.17% the size of Los Angeles.
Tip: This to-scale comparison of Los Angeles vs. Bremen 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.