Athens is about 10 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 Athens (map shows its 34 named neighbourhoods; the area covers the whole city) is approximately 412 sq km, making Athens 10.52% the size of Melbourne.
Tip: This to-scale comparison of Melbourne vs. Athens uses the Mercator projection, which distorts the size of regions near the poles.
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