Traditionally, the fathom represents the distance extending from one fingertip of one hand to the corresponding fingertip of the other hand when both arms are outstretched. While it is a common unit in many civilations, half that unit, the yard, is also common for measuring distances of that order of magnitude. This page gives a listing of fathom-size units on this wiki.

Estado (Old Castilian)
Toise (French pre-revolutionary)
Orguia (Attic Greek)
Fathom (British/American nautical measure)