What does Ezekiel 43:13 mean?

Here are the measurements for the altar, in cubits (each cubit is about a foot and a half): The base is a foot and a half high and a foot and a half wide, with a rim around its edge. The height of the altar is three feet. Ezekiel 43:13 - Modern Text Bible

(Ezekiel gives precise measurements for the altar, emphasizing its importance and the care required in its construction.)