Genesis 6:15

Overview - Genesis 6
1	The wickedness of the world, which provoked God's wrath, and caused the flood.
8	Noah finds grace.
9	His generations, etc.
14	The order, form, dimensions, and end of the ark.

Genesis 6:15  (King James Version)
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.