Hawaii is about 2.5 times smaller than Netherlands.

Netherlands is approximately 41,543 sq km, while Hawaii is approximately 16,635 sq km, making Hawaii 40.04% the size of Netherlands. Meanwhile, the population of Netherlands is ~17.4 million people (16.0 million fewer people live in Hawaii).
Tip: This to-scale comparison of Netherlands vs. Hawaii uses the Mercator projection, which distorts the size of regions near the poles.
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