Berlin is about 4.4 times smaller than Melbourne.

Melbourne (the 27 councils of metropolitan Melbourne, without the Yarra Ranges, Cardinia, Mornington Peninsula and Nillumbik) is approximately 3,915 sq km, while Berlin is approximately 891 sq km, making Berlin 22.76% the size of Melbourne.
Tip: This to-scale comparison of Melbourne vs. Berlin uses the Mercator projection, which distorts the size of regions near the poles.
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