Exodus 39:7-9

Darby Translation

⁷ And he put them on the shoulder-pieces of the ephod, [as] stones of memorial for the children of Israel; as Jehovah had commanded Moses.

⁸ And he made the breastplate of artistic work, like the work of the ephod, of gold, blue, and purple, and scarlet, and twined byssus.

⁹ It was square; double did they make the breastplate, a span the length thereof, and a span the breadth thereof, doubled.