Iceland is about 390 times bigger than Cayman Islands.

Cayman Islands is approximately 264 sq km, while Iceland is approximately 103,000 sq km, making Iceland 38,915% larger than Cayman Islands. Meanwhile, the population of Cayman Islands is ~75,844 people (316,560 more people live in Iceland).
Tip: This to-scale comparison of Cayman Islands vs. Iceland uses the Mercator projection, which distorts the size of regions near the poles.
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