Ontario is about 1.3 times bigger than New South Wales.

New South Wales is approximately 801,150 km² (309,326 sq mi), while Ontario is approximately 1,076,395 km² (415,598 sq mi), making Ontario 34% larger than New South Wales.
Tip: This to-scale comparison of New South Wales vs. Ontario uses the Mercator projection, which distorts the size of regions near the poles.
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