An ark, or little chest, or coffer, for the uses after mentioned. Two cubits and a half; understand it of the common cubit, which is generally conceived to contain a foot and a half of our measure. See Genesis 6:15.
Related Commentaries of Exodus 25:10
Exodus 25:10
10 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.