'Seven and a half' in the Bible

The length of the courtyard is to be one hundred fifty feet and the width seventy-five feet, and the height of the fine twisted linen hangings is to be seven and a half feet, with their bronze bases.

The curtain for the gate of the courtyard was of blue, purple, and scarlet yarn and fine twisted linen, the work of an embroiderer. It was thirty feet long, and like the hangings in the courtyard, it was seven and a half feet high,