South Georgia and South Sandwich Islands is about 46 times smaller than Missouri.

Missouri is approximately 178,414 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 2.19% the size of Missouri.
Tip: This to-scale comparison of Missouri 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. Missouri