The uniform of Siamese pre-modern police force security officers during the Sukhothai Period, from 1238 to 1448 AD, i.e. at the dawn of Siamese-Thai self-rule, after Phra Ruwang liberated his people from the yoke of the ruling Khmer (fig.).

Uniform of security officers during the Ayutthaya Period, between 1350 and 1767 AD with a sword and shield decorated with the kala (fig.) or kirtimukha-like (fig.) face of a yak called Jaturamuk, and which today is the official seal of the Royal Thai Police and known as trah lohkhen tamruat (fig.).

Uniform of security officers in the beginning of the Rattanakosin Period, around 1782 AD.

Uniforms of the first western-style Siamese police officers, after the force was reformed in the reign of Rama IV, and of the following reigns of Rama V and Rama VI.

Uniform of Siamese-Thai police officers in the reigns of Rama VII and Rama VIII, which remained unchanged in both reigns.

Common contemporary uniform of police officers of the Royal Thai Police, yet there are many varieties according to unit and specific task.