Genesis 7:20

The waters rose and covered the mountaintops to a depth of fifteen cubits.

Note 15 cubits is approximately 22.5 feet or 6.9 meters.

Fifteen cubits upward did the waters prevail; and the mountains were covered.

The waters rose fifteen cubits higher, and the mountains were covered.

Note A cubit is the length from the tip of the middle finger to the elbow on a man’s arm, or about 18 inches or 46 centimeters.

Fifteen cubits upward did the waters prevail; and the mountains were covered.