Exodus 26:2

2 All the curtains are to be the same size—twenty-eight cubits long and four cubits wide.a

Read Exodus 26:2 Using Other Translations

The length of one curtain shall be eight and twenty cubits, and the breadth of one curtain four cubits: and every one of the curtains shall have one measure.
The length of each curtain shall be twenty-eight cubits, and the breadth of each curtain four cubits; all the curtains shall be the same size.
These ten curtains must all be exactly the same size—42 feet long and 6 feet wide.