In my case I didn’t get into PE for size. My main objective was to get harder erections and to control premature ejaculation.
In both instances I believe I have seen improvements. But it is difficult to measure the hardness of an erection. Also the controling ejaculations is hit and miss.
But I feel like I am accomplishing something. When I was young along time ago I could generally get up 7”. When I first started PE I measured in at 6.25. After only 2 weeks I got back to 7” . When I measure for my first PE datebase entry I measured 6.75”. So I see what this month brings. I am not really concerned with the gains in size as long as it is nice and hard and my balls hang.