Exodus 25:10

10And they are to construct an ark of acacia wood, two and a half cubits long, a cubit and a half wide, and a cubit and a half high.25:10 The ark was approximately 3.75 feet long, 2.25 feet wide, and 2.25 feet high (114.3 centimeters long, 68.6 centimeters wide, and 68.6 centimeters high).