'Doubled' in the Bible

and thou hast joined the five curtains apart, and the six curtains apart, and hast doubled the six curtains over-against the front of the tent.

At the two corners they must be doubled at the lower end and finished together at the top in one ring. So it will be for both.

Foursquare it shall be being doubled; a span shall be the length thereof, and a span shall be the breadth thereof.

At the two corners they were doubled at the lower end and finished together at the top in one ring. So he did for both.

It was foursquare; they made the breastplate double: a span was the length thereof, and a span the breadth thereof, being doubled.