Ezekiel 41:2-5

ISV(i) 2 The entrance was ten cubits wide and its door jambs were five cubits wide on each side. He measured the length of the nave at 40 cubits and its width at 20 cubits.
3 Then he went inside and measured the door jambs at two cubits wide and the doorway at six cubits high. The doorway was seven cubits wide. 4 He measured its length at 20 cubits, its width at 20 cubits in front of the structure, and then he told me, “This is the most holy area.”
5 Next, he measured the Temple walls at six cubits high and the width of the side chambers at four cubits around all four sides of the Temple.