British Indian Ocean Territory is about 1.9 times smaller than Jersey.

Jersey is approximately 116 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 51.72% the size of Jersey. Meanwhile, the population of Jersey is ~102,146 people (99,146 fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Jersey 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.