Mali is about 20,670 times bigger than British Indian Ocean Territory.

British Indian Ocean Territory is approximately 60 sq km, while Mali is approximately 1,240,192 sq km, making Mali 2,066,887% larger than British Indian Ocean Territory. Meanwhile, the population of British Indian Ocean Territory is ~3,000 people (25.2 million more people live in Mali).
Tip: This to-scale comparison of British Indian Ocean Territory vs. Mali 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.