James Lockhart Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 214.
a measure from the middle of the chest to the outstretched hand, often half a matl; approximately 83.59 cm (?)
The Testaments of Culhuacan, eds. S. L. Cline and Miguel León-Portilla (Los Angeles: UCLA Latin American Center Publications, 1984), p. 15; and see John E. Clark, Aztec Dimensions of Holiness, cited in: http://mathforum.org/kb/message.jspa?messageID=7615867.
see attestations for an example where it is equated with one vara
(Tlaxcala, 1585) Catálogo de documentos escritos en náhuatl, siglo XVI, vol. I (Tlaxcala: Gobierno del Estado de Tlaxcala y el Archivo Histórico del Estado de Tlaxcala, 2013), 287.