Adam Clarke on Ezekiel 43:17

And the settle - The ledge on which the priests walked round the altar, see Eze 43:14. By these settles or ledges the altar was narrowed towards the top. "The ascent shall look toward the east;" this ascent was an inclined plane. But these settles, or more properly ledges, as Bp. Newcome translates, may be thus computed. The altar itself was ten feet high and twenty broad; the same as that of Solomon, 2Chr 4:1.

Height Cubits For the base, Eze 43:13, is in height 1 From the surface of the base to the first ledge, Eze 43:14 1 From the lower ledge to the upper, Eze 43:14 4 From the upper ledge to the ariel or hearth, Eze 43:15 4 In all 10 Breadth Cubits And as to the breadth, the upper ledge, Eze 43:17, was 14 Add a cubit on each side for the higher ledge, Eze 43:14, latter part 2 Add a cubit on each side for the lower ledge, Eze 43:14, former part 2 Add a cubit on each side for the base, Eze 43:13 2 In all 20

The altar of burnt-offerings, described Exo 27:1; Exo 38:1, was smaller than this, because it was to be removed from place to place with the tabernacle. This was designed for a permanent temple. See Bp. Newcome on this chapter.