New Caledonia is about 80 times smaller than Alaska.

Alaska is approximately 1,481,348 sq km, while New Caledonia is approximately 18,575 sq km, making New Caledonia 1.25% the size of Alaska. Meanwhile, the population of Alaska is ~710,231 people (413,071 fewer people live in New Caledonia).
Tip: This to-scale comparison of Alaska vs. New Caledonia uses the Mercator projection, which distorts the size of regions near the poles.