'Hand breadth' in the Bible

And behold a wall on the outside of the house round about, and in the man's hand a measuring rod of six cubits long by the cubit and a handbreadth: so he measured the width of the building, one rod; and the height, one rod.

And these are the measurements of the altar by cubits: The cubit is a cubit and a handbreadth; the base shall be a cubit high, and the width a cubit, and its rim all around its edge shall be a span: and this shall be the height of the altar.