'Eleven' in the Bible

"You are to make curtains of goat hair for a tent over the tent. You are to make eleven curtains.

The length of each curtain is to be 30 cubits, and the width of each curtain two cubits; the measurements of each of the eleven curtains is to be the same.

The length of each curtain was 30 cubits, and the width of each curtain was two cubits; the measurements of each of the eleven curtains was the same.