Saskatchewan is about 1.2 times smaller than New South Wales.

New South Wales is approximately 801,150 km² (309,326 sq mi), while Saskatchewan is approximately 651,900 km² (251,700 sq mi), making Saskatchewan 81.37% the size of New South Wales.
Tip: This to-scale comparison of New South Wales vs. Saskatchewan uses the Mercator projection, which distorts the size of regions near the poles.
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