Exodus 36:9

And he made the ephod of gold, and blue, and purple, and spun scarlet, and fine linen twined.

The length of one curtain was twenty and eight cubits, and the breadth of one curtain four cubits: the curtains were all of one size.

The length of each curtain was twenty-eight cubits, and the width of each curtain four cubits. All the curtains had one measure.