New South Wales is about 1.2 times bigger than Manitoba.

Manitoba is approximately 647,797 km² (250,116 sq mi), while New South Wales is approximately 801,150 km² (309,326 sq mi), making New South Wales 24% larger than Manitoba.
Tip: This to-scale comparison of Manitoba vs. New South Wales uses the Mercator projection, which distorts the size of regions near the poles.
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