When I started stretching and jelqing, I gained about half an half an inch in length, and about the same in girth.
When I started pumping, I would notice that I would go from 6 inches erect to 6 and a half inches in the tube in terms of length, and slowly, over time, I would have temporary gains in girth, getting up to about 5 3/4th.
I stopped when I was no longer living on my own, and I settled on 6 and a quarter in length and 5 and a half in girth.
I stretched, and did some jelqing, hoping to gain back lost length, and started pumping again. Now, I can pump to seven inches, my erections are 6 and a half out of the tube, I am starting to fill my tube girth wise, and I can get girth to over 6 inches. I do ten minutes in the pump, with light pressure, slowly raising pressure each ten minute session, and now have progressed to 10 minutes in, five minutes out, and a total of four sessions. I do it every two to three days.
In the end, my flaccid hang is better, my erections is slowly getting more larger, and I feel that allowing the penis to ease into it, and being able to over time get a good stretch in the tube is slowly helping me to excel past what I was doing with manual stretching and jelqing ever did.
It is a slow and steady process.