Liechtenstein is about 2.7 times bigger than British Indian Ocean Territory.

British Indian Ocean Territory is approximately 60 sq km, while Liechtenstein is approximately 160 sq km, making Liechtenstein 167% larger than British Indian Ocean Territory.
Tip: This to-scale comparison of British Indian Ocean Territory vs. Liechtenstein uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Liechtenstein vs. British Indian Ocean Territory