New South Wales is about 10 times smaller than Australia.

Australia is approximately 7,741,220 sq km, while New South Wales is approximately 801,150 km² (309,326 sq mi), making New South Wales 10.35% the size of Australia.
Tip: This to-scale comparison of Australia vs. New South Wales 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.