Each curtain refers to each of the ten pieces of linen cloth in verse 1, which was to be twenty-eight cubits long and four cubits wide. All the curtains shall have one measure simply emphasizes that each curtain was to be “the same size” (Good News Translation). This means that each piece was to be about “14 yards” by “2 yards” (Good News Translation), or “twelve meters” by “two meters.” Contemporary English Version has “Make each piece fourteen yards long and two yards wide.”

Quoted with permission from Osborn, Noel D. and Hatton, Howard A. A Handbook on Exodus. (UBS Helps for Translators). New York: UBS, 1999. For this and other handbooks for translators see here .