Maryland is about 7 times bigger than Sydney.

Sydney (the 30 councils of metropolitan Sydney, without the Blue Mountains, Hawkesbury, Wollondilly and the Central Coast) is approximately 3,810 sq km, while Maryland is approximately 25,314 sq km, making Maryland 564% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Maryland 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.