Sydney is about 32 times bigger than Dublin.

Dublin is approximately 118 sq km, while Sydney (the 30 councils of metropolitan Sydney, without the Blue Mountains, Hawkesbury, Wollondilly and the Central Coast) is approximately 3,810 sq km, making Sydney 3,134% larger than Dublin.
Tip: This to-scale comparison of Dublin vs. Sydney uses the Mercator projection, which distorts the size of regions near the poles.
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