Exodus 39:8

And he made the breastplate, artistically woven like the workmanship of the ephod, of gold, blue, purple, and scarlet thread, and of fine woven linen.

Surrounding context

39:7 He put them on the shoulders of the ephod as memorial stones for the sons of Israel, as the LORD had commanded Moses.

39:8 And he made the breastplate, artistically woven like the workmanship of the ephod, of gold, blue, purple, and scarlet thread, and of fine woven linen.

39:9 They made the breastplate square by doubling it; a span was its length and a span its width when doubled.

Translation and sources