Moscow is about 36 times bigger than Santa Ana.

Santa Ana (map shows its 60 named neighbourhoods; the area covers the whole city) is approximately 71 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 3,513% larger than Santa Ana.
Tip: This to-scale comparison of Santa Ana 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.