Djibouti is about 3 times bigger than French Southern and Antarctic Lands.

French Southern and Antarctic Lands is approximately 7,829 sq km, while Djibouti is approximately 23,200 sq km, making Djibouti 196% larger than French Southern and Antarctic Lands.
Tip: This to-scale comparison of French Southern and Antarctic Lands vs. Djibouti uses the Mercator projection, which distorts the size of regions near the poles.
Compare further: Djibouti vs. French Southern and Antarctic Lands