Ezekiel 43:13

And these are the measures of the altar by cubits (the cubit is a cubit and a handbreadth). The bottom shall be a cubit, and the breadth a cubit, and the border of it by the edge of it round about a span. And this shall be the base

Exodus 27:1-8

And thou shall make the altar of acacia wood, five cubits long, and five cubits broad (the altar shall be foursquare), and the height of it shall be three cubits.

2 Chronicles 4:1

Moreover he made an altar of brass, twenty cubits the length of it, and twenty cubits the breadth of it, and ten cubits the height of it.

Ezekiel 40:5

And, behold, a wall on the outside of the house round about, and in the man's hand a measuring reed six cubits long, of a cubit and a handbreadth each. So he measured the thickness of the building, one reed, and the height, one ree

Ezekiel 41:8

I also saw that the house had a raised basement round about. The foundations of the side-chambers were a full reed of six great cubits.

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 thou shall make the altar of acacia wood, five cubits long, and five cubits broad (the altar shall be foursquare), and the height of it shall be three cubits.
2 Chronicles 4:1
Moreover he made an altar of brass, twenty cubits the length of it, and twenty cubits the breadth of it, and ten cubits the height of it.

The cubit

Ezekiel 40:5
And, behold, a wall on the outside of the house round about, and in the man's hand a measuring reed six cubits long, of a cubit and a handbreadth each. So he measured the thickness of the building, one reed, and the height, one ree
Ezekiel 41:8
I also saw that the house had a raised basement round about. The foundations of the side-chambers were a full reed of six great cubits.