Italy is approximately 301,340 sq km, while New Caledonia is approximately 18,575 sq km, making New Caledonia 6.16% the size of Italy. Meanwhile, the population of Italy is ~62.4 million people (62.1 million fewer people live in New Caledonia).
This to-scale map shows a size comparison of Italy compared to New Caledonia. For more details, see an in-depth quality of life comparison of New Caledonia vs. Italy using our country comparison tool.