Exodus 38:1

MSTC⁽ⁱ⁾ ¹ And he made the burnt offering altar of sethim-wood, five cubits long and five cubits broad: even four square, and three cubits high.

Online Parallel Study Bible

Exodus 38:1 The altar of burnt offering.
Exodus 38:8 The laver of brass.
Exodus 38:9 The court, and its hangings.
Exodus 38:21 The sum of what the people offered, and the use to which it was applied.

the altar.This altar consisted of four boards of {shittim} (acacia) wood, covered with brass, and hollow in the middle; but it is supposed to have been filled up with earth when used, for it is expressly said (ch. 20:24) that the altar is to be of earth. As it was five cubits long and five cubits broad, and three cubits high, if the cubit be reckoned at 21 inches, it must have been eight feet nine inches square, and about five feet three inches in height.
Exodus 27:1-8; Exodus 40:6; Exodus 40:29; 2 Chronicles 4:1; Ezekiel 43:13-17; Romans 8:3; Romans 8:4; Romans 12:1; Hebrews 3:1
Hebrews 9:14; Hebrews 13:10; 1 Peter 2:5
foursquare; and three cubits the height thereof.
Ezekiel 43:16; John 6:37; Hebrews 13:8; Revelation 21:16