Tafsiran Yehezkiel 43:14: Rashi

And from the base on the ground [Heb. וּמֵחֵיק הָאָרֶץ. From the “yesod,” from the floor of the earth.

to the lower ledge [Heb. הָעֲזָרָה, lit. court.] Until the top of the first frame.

two cubits It was not the same in the [Second] Temple, for there, we learned (Zeb. 54a): “They bring a frame of 32 [cubits] by 32 [cubits], whose height is a cubit,” whereas here its height is two cubits.

and the breadth one cubit when one places the second frame upon it. The second frame was thirty by thirty, the result being that it [the bottom, 32 by 32 cubit frame] had a recess around it a cubit wide which was the base. Jonathan renders: עֲזָרָה as מסְתַּמְתָא, a word for floor, [and it was called so] because one would fill the frame with smooth stones, pitch, lime, and molten lead, mix it and pour it out and smooth it out on top, and behold, it would be a kind of floor.

and from the smaller ledge to the greater ledge four cubits From the top of the lower frame until the top of the frame that was upon it was a height of four cubits.

and the breadth, one cubit This is the amount of the recess of the circuit. It went up four cubits and went in one cubit. [In the second Temple, it went up five cubits and went in one.] And this is the “circuit.” The lower one is called smaller because it is only two [cubits] high, whereas the upper one is four.