Ireland is approximately 70,273 sq km, while Cayman Islands is approximately 264 sq km, making Cayman Islands 0.38% the size of Ireland. Meanwhile, the population of Ireland is ~5.2 million people (5.1 million fewer people live in Cayman Islands).
This to-scale map shows a size comparison of Ireland compared to Cayman Islands. For more details, see an in-depth quality of life comparison of Cayman Islands vs. Ireland using our country comparison tool.