keup [Thai คืบ]

In Thailand, at least as early as the 17th century – 20th century¹, a unit of length, according to the Weights and Measures Act B.E. 2542 (1999) and since the standardization of 1923, = 25 centimeters (about 9.84 inches). Originally the distance between the tip of the thumb and the tip of the middle finger, with the fingers extended as far apart as possible. Earlier, exactly 10 inches, and before that about 24 cm. link to a table showing relationships between Thai units of length Also romanized as kup, k'up, keub³, k�b, kheup, khuep and kug². Abbreviation, k.

1. United Nations, 1966.

2. Simmonds, page 467.

3. W. A. Browne, page 273.


Ils measurent ordinairement leurs Etoffes par palmes, qu'ils appellent Chup, & par coudées qu'ils nomment Soc: Leur coudée a un pied & demy & deux pouces.

They ordinarily measure their cloth in palmes, which they call Chup [keup], and by cubits which are called sok: their cubit is a pied and a half and 2 pouces.

Nicholas Gervaise.
Histoire Naturelle et Politique du Royaume de Siam.
Paris: Claude Barbin, 1688.
Page 154.

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