New Caledonia is about 3 times smaller than Croatia.

Croatia is approximately 56,594 sq km, while New Caledonia is approximately 18,575 sq km, making New Caledonia 32.82% the size of Croatia. Meanwhile, the population of Croatia is ~4.2 million people (3.9 million fewer people live in New Caledonia).
Tip: This to-scale comparison of Croatia vs. New Caledonia uses the Mercator projection, which distorts the size of regions near the poles.
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