Thailand is approximately 513,120 sq km, while Peru is approximately 1,285,216 sq km, making Peru 150% larger than Thailand. Meanwhile, the population of Thailand is ~69.0 million people (37.1 million fewer people live in Peru).
This to-scale map shows a size comparison of Thailand compared to Peru. For more details, see an in-depth quality of life comparison of Peru vs. Thailand using our country comparison tool.