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sandong [Burmese]

In Burma, 19ᵗʰ – 20ᵗʰ centuries, a unit of length, = 22 inches (approximately 55.88 centimeters). Also romanized as saundong, saundaum, saundaung.

United Nations, 1966.

sources

The measure of length is the cubit, of which there are two sorts—the tendam of about 18 inches, and the saundaum of 22. The latter is termed the King's Cubit, being used in measuring crown lands.

Robert Montgomery Martin.
History of the Colonies of the British Empire in the West Indies, South America, North America, Asia...
London: W. H. Allen & Co. and George Routledge, 1843.
Page 142 of Appendix 4. The author says this material was taken from the Bombay Almanack for 1838.

The royal cubit, which is the standard, was exhibited to us at the conferences, and, upon being carefully compared, was found to measure exactly 19¹⁄₁₀ English inches.

John Crawfurd.
On the Peoples and Cultures of the Kingdom of Burma.
SOAS Bulletin of Burma Research, vol. 3, no. 2 (Autumn 2005).
Crawfurd wrote in the first quarter of the 19th century.