But length isn't everything. You also have to be of decent thickness. A girl wants to be penetrated (= lenght matters) and stretched (= width matters).
Question 10: How thick is your erect penis (circumference)?
A1: More than 5in (~12.5cm). --> 1 Point
A2: More than 4in (~10cm) but less than 5in (~12.5cm). --> 3 Points
A3: Less than 4in (~10cm). --> 5 Points
Again, note how generous I am with you. A penis circumference of five inches is enjoyable, but there is definately "room for improvement" ;).