South Georgia and South Sandwich Islands is about 329 times smaller than Chad.

Chad is approximately 1,284,000 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 0.3% the size of Chad.
Tip: This to-scale comparison of Chad 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. Chad