John Gill Commentary Exodus 37:1

"And Bezalel made the ark of acacia wood: two cubits and a half was the length of it, and a cubit and a half the breadth of it, and a cubit and a half the height of it:" — Exodus 37:1 (ASV)

Ver. 1-29. And Bezaleel made the ark of shittim wood Jarchi says, Exodus 37:2

(See Gill on Exodus 37:1).