Flavius Josephus (The Jewish War 5.225), states that it was a square of 50 cubits and stood 15 cubits high. In Middot 3.1, we also find it described as square in shape, but of different dimensions, the base measuring 32 cubits on a side and the place for the altar fire as 24 cubits on a side. Here, the height is given as 8 cubits.