Ezekiel 43:13

And these the measures of the altar by cubits: a cubit, a cubit and a hand-breadth; and the bosom, a cubit and a cubit the breadth; and its bound to its lip round about, one span: and this the back of the altar.

Exodus 27:1-8

And make the altar acacia wood, five cubits the length, and five cubits the breadth; and the altar shall be quadrated: and three cubits its height

2 Chronicles 4:1

And he will make an altar of brass, twenty cubits its length, and twenty cubits its breadth, and ten cubits its height

Ezekiel 40:5

And behold a wall from without to the house round about, round about, and in the man's hand a reed of measure six cubits by the cubit, and a handbreadth: and he will measure the breadth of the building, one reed: and the height, one reed.

Ezekiel 41:8

And I saw to the house the height round about, round about the foundations of the sides the fulness of a reed, six cubits the joining.

Treasury of Scripture Knowledge

Summary

And these are the measures of the altar after the cubits: The cubit is a cubit and an hand breadth; even the bottom shall be a cubit, and the breadth a cubit, and the border thereof by the edge thereof round about shall be a span: and this shall be the higher place of the altar.

Bible References

The measures

Exodus 27:1
And make the altar acacia wood, five cubits the length, and five cubits the breadth; and the altar shall be quadrated: and three cubits its height
2 Chronicles 4:1
And he will make an altar of brass, twenty cubits its length, and twenty cubits its breadth, and ten cubits its height

The cubit

Ezekiel 40:5
And behold a wall from without to the house round about, round about, and in the man's hand a reed of measure six cubits by the cubit, and a handbreadth: and he will measure the breadth of the building, one reed: and the height, one reed.
Ezekiel 41:8
And I saw to the house the height round about, round about the foundations of the sides the fulness of a reed, six cubits the joining.