South Georgia and South Sandwich Islands is about 53 times smaller than Belarus.

Belarus is approximately 207,600 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 1.88% the size of Belarus.
Tip: This to-scale comparison of Belarus 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. Belarus