Thailand is approximately 513,120 sq km, while Italy is approximately 301,340 sq km, making Italy 58.73% the size of Thailand. Meanwhile, the population of Thailand is ~69.0 million people (6.6 million fewer people live in Italy).
This to-scale map shows a size comparison of Thailand compared to Italy. For more details, see an in-depth quality of life comparison of Italy vs. Thailand using our country comparison tool.