French Southern and Antarctic Lands is about 17,793 times bigger than Holy See (Vatican City).

Holy See (Vatican City) is approximately 0 sq km, while French Southern and Antarctic Lands is approximately 7,829 sq km, making French Southern and Antarctic Lands 1,779,218% larger than Holy See (Vatican City).
Tip: This to-scale comparison of Holy See (Vatican City) vs. French Southern and Antarctic Lands uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: French Southern and Antarctic Lands vs. Holy See (Vatican City)