British Indian Ocean Territory is about 2.4 times smaller than Wallis and Futuna.

Wallis and Futuna is approximately 142 sq km, while British Indian Ocean Territory is approximately 60 sq km, making British Indian Ocean Territory 42.25% the size of Wallis and Futuna.
Tip: This to-scale comparison of Wallis and Futuna 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. Wallis and Futuna

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