France is approximately 551,500 sq km, while Cayman Islands is approximately 264 sq km, making Cayman Islands 0.05% the size of France. Meanwhile, the population of France is ~67.8 million people (67.8 million fewer people live in Cayman Islands).
This to-scale map shows a size comparison of France compared to Cayman Islands. For more details, see an in-depth quality of life comparison of Cayman Islands vs. France using our country comparison tool.