Etzba (Ancient Hebrew)
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The etzba (אצבע, meaning finger, but sometimes rendered as fingerbreadth or even thumbbreadth) was the smallest unit of length or distance in the Ancient Hebrew measurement system. The plural is etzba'oth in the original Biblical pronunciation, etzba'ot in the modern Israeli pronunciation (אצבעות)
Value in terms of modern unitsEdit
Ancient Hebrew units of length or distance are mentioned in the Bible, but their values in terms of modern units are open to some speculation. The only way of determining the length of any Ancient Hebrew unit would be to measure something in modern terms whose length was given by the Hebrews in their units. Unlike the Attic Greek and Ancient Roman units, there are not good examples of such measurable objects, so much of the information we have is based on guesswork.
The range of values of the length of the etzba given in various sources gives the minimum as 2 cm = 0.79 in. and the maximum as 2.67 cm = 1.05 in. = 0.09 ft .
Relation to other Ancient Hebrew length unitsEdit
 4 etzba'oth = 1 tefach