British Indian Ocean Territory is about 4.3 times bigger than Cocos (Keeling) Islands.

Cocos (Keeling) Islands is approximately 14 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 329% larger than Cocos (Keeling) Islands.
Tip: This to-scale comparison of Cocos (Keeling) Islands vs. British Indian Ocean Territory uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: British Indian Ocean Territory vs. Cocos (Keeling) Islands

Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.