French Southern and Antarctic Lands is about 10 times bigger than Tonga.

Tonga is approximately 747 sq km, while French Southern and Antarctic Lands is approximately 7,829 sq km, making French Southern and Antarctic Lands 948% larger than Tonga.
Tip: This to-scale comparison of Tonga 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. Tonga

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