Melbourne is about 32 times bigger than Boston.

Boston is approximately 124 sq km, while Melbourne (the 27 councils of metropolitan Melbourne, without the Yarra Ranges, Cardinia, Mornington Peninsula and Nillumbik) is approximately 3,915 sq km, making Melbourne 3,057% larger than Boston.
Tip: This to-scale comparison of Boston vs. Melbourne uses the Mercator projection, which distorts the size of regions near the poles.
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