British Indian Ocean Territory is about 4.4 times smaller than Cayman Islands.

Cayman Islands is approximately 264 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 22.73% the size of Cayman Islands. Meanwhile, the population of Cayman Islands is ~75,844 people (72,844 fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Cayman Islands vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: British Indian Ocean Territory vs. Cayman Islands

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