Indiana is about 24 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 Indiana is approximately 92,895 sq km, making Indiana 2,338% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Indiana uses the Mercator projection, which distorts the size of regions near the poles.
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