Wallis and Futuna is about 55 times smaller than French Southern and Antarctic Lands.

French Southern and Antarctic Lands is approximately 7,829 sq km, while Wallis and Futuna is approximately 142 sq km, making Wallis and Futuna 1.81% the size of French Southern and Antarctic Lands.
Tip: This to-scale comparison of French Southern and Antarctic Lands vs. Wallis and Futuna uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Wallis and Futuna vs. French Southern and Antarctic Lands