The hand is a non-SI unit of measurement of length standardized to 4 in. It is used to measure the height of horses in many English-speaking countries, including Australia, Canada, the Republic of Ireland, the United Kingdom, and the United States. It was originally based on the breadth of a human hand.

What is a biblical Handbreadth?

A space equal to the breadth of the hand; a palm - Exodus 37:12. noun.

What does the word Handbreadth mean?

: any of various units of length varying from about 2¹/₂ to 4 inches based on the breadth of a hand.