Lesotho is about 3.9 times bigger than French Southern and Antarctic Lands.

French Southern and Antarctic Lands is approximately 7,829 sq km, while Lesotho is approximately 30,355 sq km, making Lesotho 288% larger than French Southern and Antarctic Lands.
Tip: This to-scale comparison of French Southern and Antarctic Lands vs. Lesotho uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Lesotho vs. French Southern and Antarctic Lands