Thailand is approximately 513,120 sq km, while Puerto Rico is approximately 9,104 sq km, making Puerto Rico 1.77% the size of Thailand. Meanwhile, the population of Thailand is ~69.0 million people (65.8 million fewer people live in Puerto Rico).
This to-scale map shows a size comparison of Thailand compared to Puerto Rico. For more details, see an in-depth quality of life comparison of Puerto Rico vs. Thailand using our country comparison tool.