Falkland Islands (Islas Malvinas) is about 1.6 times bigger than French Southern and Antarctic Lands.

French Southern and Antarctic Lands is approximately 7,829 sq km, while Falkland Islands (Islas Malvinas) is approximately 12,173 sq km, making Falkland Islands (Islas Malvinas) 55% larger than French Southern and Antarctic Lands.
Tip: This to-scale comparison of French Southern and Antarctic Lands vs. Falkland Islands (Islas Malvinas) uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Falkland Islands (Islas Malvinas) vs. French Southern and Antarctic Lands