South Georgia and South Sandwich Islands is about 14 times smaller than Croatia.

Croatia is approximately 56,594 sq km, while South Georgia and South Sandwich Islands is approximately 3,903 sq km, making South Georgia and South Sandwich Islands 6.9% the size of Croatia.
Tip: This to-scale comparison of Croatia 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. Croatia