El Salvador is about 1.6 times smaller than Moldova.

Moldova is approximately 33,851 sq km, while El Salvador is approximately 21,041 sq km, making El Salvador 62.16% the size of Moldova. Meanwhile, the population of Moldova is ~3.3 million people (3.3 million more people live in El Salvador).
Tip: This to-scale comparison of Moldova vs. El Salvador uses the Mercator projection, which distorts the size of regions near the poles.