Adam Clarke's Bible Commentary Verse 2. Four-square] That is, on the upper or under surface, as it showed four equal sides; but it was twice as high as it was broad, being twenty-one inches broad, and three feet six inches high. It was called, not only the altar of incense, but also the golden altar, Num. iv. 11. For the crown, horns, staves, &c., see on the altar of burnt-offering, chap. 27. See on "chap. xxvii. 1", &c.
Matthew Henry Commentary
Verses 1-10 - The altar of incense represented the Son of God in his human nature and the incense burned thereon typified his pleading for his people The continual intercession of Christ was represented by the dail burning of incense thereon, morning and evening. Once every year the blood of the atonement was to be applied to it, denoting that the intercession of Christ has all its virtue from his sufferings on earth and that we need no other sacrifice or intercessor but Christ alone.
Original Hebrew אמה520 ארכו753 ואמה520 רחבו7341 רבוע7251 יהיה1961 ואמתים520 קמתו6967 ממנו4480 קרנתיו׃7161