South Georgia and South Sandwich Islands is about 9 times bigger than Seychelles.

Seychelles is approximately 455 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 758% larger than Seychelles.
Tip: This to-scale comparison of Seychelles vs. South Georgia and South Sandwich Islands uses the Mercator projection, which distorts the size of regions near the poles.

Compare further: South Georgia and South Sandwich Islands vs. Seychelles