United Kingdom is about 2.1 times smaller than Thailand.

Thailand is approximately 513,120 sq km, while United Kingdom is approximately 243,610 sq km, making United Kingdom 47.48% the size of Thailand. Meanwhile, the population of Thailand is ~69.0 million people (3.2 million fewer people live in United Kingdom).

This to-scale map shows a size comparison of Thailand compared to United Kingdom. For more details, see an in-depth quality of life comparison of United Kingdom vs. Thailand using our country comparison tool.

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