Well. of course, im new, so I cant really say how much I will gain.
But, I focus on length only - but that doesn't mean I don't do girth exercises.
For as many of you have said, girth work compliments the length work.
But my focus is on the length until I reach about 8.5 Inches, then I will work my girth up from 6 inches to 6.5-7