Sydney is about 5 times smaller than Saint Paul.

Saint Paul is approximately 135 sq km, while Sydney is approximately 27 sq km, making Sydney 19.83% the size of Saint Paul.
Tip: This to-scale comparison of Saint Paul vs. Sydney 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.