Thailand is approximately 513,120 sq km, while Ecuador is approximately 283,561 sq km, making Ecuador 55.26% the size of Thailand. Meanwhile, the population of Thailand is ~69.0 million people (52.1 million fewer people live in Ecuador).
This to-scale map shows a size comparison of Thailand compared to Ecuador. For more details, see an in-depth quality of life comparison of Ecuador vs. Thailand using our country comparison tool.