Melbourne is about 6 times bigger than Toronto.

Toronto is approximately 630 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 521% larger than Toronto.
Tip: This to-scale comparison of Toronto vs. Melbourne 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.