To what extent can I grow/gain?

[jjjjjj]

You need to start and see what happens. From what I read around here some guys guys get length easily some get girth easily. You didn't say how thick you were and I would say girth is better then length since you already have enough length. 6.5 X 6 is big by any women standards. 6.5 X 5.5 is big. 6.5 X 5 not so much.

I wood just get going and see what happens, go from there. I know I didn't expect much and I wanted more girth not length when I start and of course length happen right away for me. I went on a pretty much all girth routine which had ups and downs. Might be exact opposite for you??? No one knows till they give it a try.

I'm 6 NBPEL and 5.2 girth

[mannakonda]

If you manage to stick with PE for at least a year, 1" x 0.5" would be a reasonable goal imo.

[WIItard]

If you manage to stick with PE for at least a year, 1" x 0.5" would be a reasonable goal imo.

Agree.