Colombia is about 18,982 times bigger than British Indian Ocean Territory.

British Indian Ocean Territory is approximately 60 sq km, while Colombia is approximately 1,138,910 sq km, making Colombia 1,898,083% larger than British Indian Ocean Territory. Meanwhile, the population of British Indian Ocean Territory is ~3,000 people (53.4 million more people live in Colombia).
Tip: This to-scale comparison of British Indian Ocean Territory vs. Colombia 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.