Cabo Verde is about 1.2 times smaller than Delaware.

Delaware is approximately 5,060 sq km, while Cabo Verde is approximately 4,033 sq km, making Cabo Verde 79.7% the size of Delaware. Meanwhile, the population of Delaware is ~897,934 people (301,227 fewer people live in Cabo Verde).
Tip: This to-scale comparison of Delaware vs. Cabo Verde uses the Mercator projection, which distorts the size of regions near the poles.