finger's breadth

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Noun1.finger's breadth - the length of breadth of a finger used as a linear measure
linear measure, linear unit - a unit of measurement of length
References in periodicals archive ?
This arch lies a finger's breadth proximal to the superficial palmar arch.
Using two fingers, push inwards and upwards (in the direction of the head) against the infant's breastbone, approximately one finger's breadth below the nipple line.
Even from a distance of 16,000km Warne has the knack of holding you a finger's breadth from the action.