Brisbane is about 1.9 times smaller than Moscow.

Moscow (map shows its 125 districts within the pre-2012 boundary; the area includes New Moscow) is approximately 2,562 sq km, while Brisbane is approximately 1,343 sq km, making Brisbane 52.42% the size of Moscow.
Tip: This to-scale comparison of Moscow vs. Brisbane 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.