Durham is about 13 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 Durham (map shows its 228 named neighbourhoods; the area covers the whole city) is approximately 308 sq km, making Durham 7.86% the size of Melbourne.
Tip: This to-scale comparison of Melbourne vs. Durham uses the Mercator projection, which distorts the size of regions near the poles.
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