God gave Noah the dimensions of the Ark as follows: “And this is the fashion which thou shalt make it of: The length of the ark shall be three hundred cubits, the breadth of it fifty cubits, and the height of it thirty cubits” (Genesis 6:15). Based on an 18-inch cubit, that would make the Ark 450 feet long (the length of one and one half football fields), 75 feet wide, and 45 feet tall.

My model is 1/60 scale making it 7.5 feet (90 inches) long, 15 inches wide, and 9 inches tall. (Those are inside dimensions.)