The klon, also spelled glawn or gaun (Thai: กลอน, [klɔ̄ːn]; Lao: ກອນ, [kɔ̀ːn]), is a Thai/Lao term referring to either poetic verse in general, or a specific prosodic form in Thai and Lao poetry.
In the narrow meaning of the term, the klon is a more recently developed form of Thai poetry where a stanza has four wak (lines), each with the same number of syllables.
All metres have the same rhyming scheme, and there are also requirements on the tone of the final syllable of each wak.
The following plan shows the structure of klon suphap (two stanzas) in the most common eight-syllable variety, which was employed extensively by Sunthorn Phu, and is the most common form of the Rattanakosin period.
There is a set pattern for the tone marks to be used at various points in the stanza, plus rhyme schemes to hold the unit together.