John Gill Commentary Exodus 38:18

"And the screen for the gate of the court was the work of the embroiderer, of blue, and purple, and scarlet, and fine twined linen: and twenty cubits was the length, and the height in the breadth was five cubits, answerable to the hangings of the court." — Exodus 38:18 (ASV)

(See Gill on Exodus 38:9).