'Edge' in the Bible

"Here are the measurements of the altar in cubits that were a cubit and a handbreadth long: its base is a cubit long and a cubit wide, and its border around the edge at one handbreadth is to be the height of the altar.

From the base on the ground to its lower edge is to be two cubits, with its width to be one cubit. From the lesser ledge to the larger edge is to be four cubits. Its width is to be one cubit.