And they shall make an ark of shittim wood: two cubits and a half shall be the length thereof, and a cubit and a half the breadth thereof, and a cubit and a half the height thereof. They shall make an ark - ארון aron signifies an ark, chest, coffer, or coffin. It is used particularly to designate that chest or coffer in which the testimony or two tables of the covenant was laid up, on the top of which was the propitiatory or mercy-seat, (see on Exodus 25:17), and at the end of which were the cherubim of gold, (Exodus 25:18-20), between whom the visible sign of the presence of the supreme God appeared as seated upon his throne. The ark was the most excellent of all the holy things which belonged to the Mosaic economy, and for its sake the tabernacle and the temple were built, Exodus 26:33; Exodus 40:18, Exodus 40:21. It was considered as conferring a sanctity wherever it was fixed, 2 Chronicles 8;11; 2 Samuel 6:12.
Two cubits and a half shall be the length, etc. - About four feet five inches in length, taking the cubit as twenty-one inches, and two feet six inches in breadth and in depth. As this ark was chiefly intended to deposit the two tables of stone in, which had been written by the finger of God, we may very reasonably conjecture that the length of those tables was not less than four feet and their breadth not less than two. As to their thickness we can say nothing, as the depth of the ark was intended for other matters besides the two tables, such as Aaron's rod, the pot of manna, etc., etc., though probably these were laid up beside, not in, the ark.