Puerto Rico is about 6 times smaller than Croatia.

Croatia is approximately 56,594 sq km, while Puerto Rico is approximately 9,104 sq km, making Puerto Rico 16.09% the size of Croatia. Meanwhile, the population of Croatia is ~3.9 million people (691,365 fewer people live in Puerto Rico).
Tip: This to-scale comparison of Croatia vs. Puerto Rico uses the Mercator projection, which distorts the size of regions near the poles.
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