South Georgia and South Sandwich Islands is about 5 times bigger than Bahrain.

Bahrain is approximately 760 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 414% larger than Bahrain.
Tip: This to-scale comparison of Bahrain 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. Bahrain