British Indian Ocean Territory is about 2.3 times bigger than Tuvalu.

Tuvalu is approximately 26 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 131% larger than Tuvalu. Meanwhile, the population of Tuvalu is ~9,492 people (6,492 fewer people live in British Indian Ocean Territory).
Tip: This to-scale comparison of Tuvalu 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.