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etzbah [Hebrew, אצבﬠ ]

An ancient Hebrew unit of length, in concept a fingerbreadth, probably about 1.9 cm, ³/₄ inch. Also romanized as ’eṣba‘

In the Bible in English, it has been translated by “finger.”

sources

And concerning the pillars, the height of one pillar was eighteen cubits; and a fillet of twelve cubits did compass it; and the thickness thereof was four fingers: it was hollow.

Jeremiah 52:21 (King James version)