Nevada is about 15 times bigger than New Caledonia.

New Caledonia is approximately 18,575 sq km, while Nevada is approximately 284,448 sq km, making Nevada 1,431% larger than New Caledonia. Meanwhile, the population of New Caledonia is ~295,333 people (3.0 million more people live in Nevada).
Tip: This to-scale comparison of New Caledonia vs. Nevada uses the Mercator projection, which distorts the size of regions near the poles.
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