Ecuador is approximately 283,561 sq km, while Cuba is approximately 110,860 sq km, making Cuba 39.1% the size of Ecuador. Meanwhile, the population of Ecuador is ~16.9 million people (5.8 million fewer people live in Cuba).
This to-scale map shows a size comparison of Ecuador compared to Cuba. For more details, see an in-depth quality of life comparison of Cuba vs. Ecuador using our country comparison tool.