Exodus 39:7-9

New Revised Standard Version, Anglicised

⁷ He set them on the shoulder-pieces of the ephod, to be stones of remembrance for the sons of Israel; as the Lord had commanded Moses.

⁸ He made the breastpiece, in skilled work, like the work of the ephod, of gold, of blue, purple, and crimson yarns, and of fine twisted linen. ⁹ It was square; the breastpiece was made double, a span in length and a span in width when doubled.