Moscow is about 1.5 times bigger than Houston.

Houston is approximately 1,659 sq km, while Moscow (map shows its 125 districts within the pre-2012 boundary; the area includes New Moscow) is approximately 2,562 sq km, making Moscow 54% larger than Houston.
Tip: This to-scale comparison of Houston vs. Moscow 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.