South Georgia and South Sandwich Islands is about 11 times bigger than Grenada.

Grenada is approximately 344 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 1,035% larger than Grenada.
Tip: This to-scale comparison of Grenada 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. Grenada