'Stretch' in the Bible

And the Lord said, Say to Aaron, Let the rod in your hand be stretched out over the waters of Egypt, and over the rivers and the streams and the pools, and over every stretch of water, so that they may be turned to blood; and there will be blood through all the land of Egypt, in vessels of wood and in vessels of stone.

It is to be square, folded in two, a hand-stretch long and a hand-stretch wide.

It was square and folded in two, as long and as wide as the stretch of a man's hand;