Cross References → Genesis 6:15

And this is how you are to build it: The ark is to be 300 cubits long, 50 cubits wide, and 30 cubits high.

cubits

Genesis 7:20
The waters rose and covered the mountaintops to a depth of fifteen cubits.
Deuteronomy 3:11
(For only Og king of Bashan had remained of the remnant of the Rephaim. His bed of iron, nine cubits long and four cubits wide, is still in Rabbah of the Ammonites.)