Cook Islands is about 176 times smaller than Netherlands.

Netherlands is approximately 41,543 sq km, while Cook Islands is approximately 236 sq km, making Cook Islands 0.57% the size of Netherlands. Meanwhile, the population of Netherlands is ~17.4 million people (17.4 million fewer people live in Cook Islands).
Tip: This to-scale comparison of Netherlands vs. Cook Islands uses the Mercator projection, which distorts the size of regions near the poles.