Puerto Rico is about 341 times bigger than Sydney.

Sydney is approximately 27 sq km, while Puerto Rico is approximately 9,104 sq km, making Puerto Rico 33,997% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Puerto Rico 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.