New Zealand is approximately 268,838 sq km, while New Caledonia is approximately 18,575 sq km, making New Caledonia 6.91% the size of New Zealand. Meanwhile, the population of New Zealand is ~4.9 million people (4.6 million fewer people live in New Caledonia).
This to-scale map shows a size comparison of New Zealand compared to New Caledonia. For more details, see an in-depth quality of life comparison of New Caledonia vs. New Zealand using our country comparison tool.