A measurement, equal to the length from the tip of the fingers to the elbow. Four cubits make up an armspan (gzhu-'dom). In the measurements for constructing a mandala in tantra, four cubits equal one door width (sgo-tshad), except in the Kalachakra system, in which six cubits equal one door width. Also called "small unit" (cha-chung).
Tibetan: ཁྲུ། khru