China is approximately 9,596,960 sq km, while Cuba is approximately 110,860 sq km, making Cuba 1.16% the size of China. Meanwhile, the population of China is ~1.4 billion people (1.4 billion fewer people live in Cuba).
This to-scale map shows a size comparison of China compared to Cuba. For more details, see an in-depth quality of life comparison of Cuba vs. China using our country comparison tool.