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Related to handbreadth: hand's breadth
hand·breadth(hănd′brĕdth′) also hand's-breadth or hand's breadth (hăndz′-)
A linear measurement approximating the width of the palm of the hand, from 2.5 to 4 inches (6.35 to 10.16 centimeters).
handbreadth(ˈhændˌbrɛtθ; -ˌbrɛdθ) or
(Units) the width of a hand used as an indication of length
a unit of linear measure ranging from 2½ to 4 inches (6.4 to 10.2 cm).