Milan is about 2.4 times smaller than Montreal.

Montreal is approximately 432 sq km, while Milan is approximately 182 sq km, making Milan 42.12% the size of Montreal.
Tip: This to-scale comparison of Montreal vs. Milan 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.