Exodus 36:9-11

New King James Version

⁹ The length of each curtain was twenty-eight cubits, and the width of each curtain four cubits; the curtains were all the same size. ¹⁰ And he coupled five curtains to one another, and the other five curtains he coupled to one another. ¹¹ He made loops of blue yarn on the edge of the curtain on the selvedge of one set; likewise he did on the outer edge of the other curtain of the second set.