South Georgia and South Sandwich Islands is about 12 times bigger than Malta.

Malta is approximately 316 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 1,135% larger than Malta.
Tip: This to-scale comparison of Malta 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. Malta