Sacramento is about 3.8 times smaller than Sao Tome and Principe.

Sao Tome and Principe is approximately 964 sq km, while Sacramento is approximately 253 sq km, making Sacramento 26.24% the size of Sao Tome and Principe.
Tip: This to-scale comparison of Sao Tome and Principe vs. Sacramento uses the Mercator projection, which distorts the size of regions near the poles.