Moldova is about 1.5 times smaller than Costa Rica.

Costa Rica is approximately 51,100 sq km, while Moldova is approximately 33,851 sq km, making Moldova 66.24% the size of Costa Rica. Meanwhile, the population of Costa Rica is ~5.2 million people (1.9 million fewer people live in Moldova).
Tip: This to-scale comparison of Costa Rica vs. Moldova uses the Mercator projection, which distorts the size of regions near the poles.