Exodus 39:9

The English Standar Version

It was square. They made the breastpiece doubled, a span[2] its length and a span its breadth when doubled.

Cross References

Exodus 39:10

And they set in it four rows of stones. A row of sardius, topaz, and carbuncle was the first row;

Exodus 39:8

He made the breastpiece, in skilled work, in the style of the ephod, of gold, blue and purple and scarlet yarns, and fine twined linen.