SPAN

About nine or ten inches
Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof. (Exodus 28:1616Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof. (Exodus 28:16))
It was foursquare; they made the breastplate double: a span was the length thereof, and a span the breadth thereof, being doubled. (Exodus 39:99It was foursquare; they made the breastplate double: a span was the length thereof, and a span the breadth thereof, being doubled. (Exodus 39:9))