British Virgin Islands is about 2.5 times bigger than British Indian Ocean Territory.

British Indian Ocean Territory is approximately 60 sq km, while British Virgin Islands is approximately 151 sq km, making British Virgin Islands 152% larger than British Indian Ocean Territory.
Tip: This to-scale comparison of British Indian Ocean Territory vs. British Virgin Islands uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: British Virgin Islands vs. British Indian Ocean Territory