British Indian Ocean Territory is about 3 times smaller than Aruba.

Aruba is approximately 180 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 33.33% the size of Aruba. Meanwhile, the population of Aruba is ~108,785 people (105,785 fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Aruba vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.