Doubling in size would seem to be a good indication of a grower. Ive often wondered what defines a grower though. I read some stuff that said 26% of men were growers where they defined a grower as a length increased by more than 1.5 inches, this seemed like a small increase to me. Based on averages erect girth average is about an inch increase over flaccid average girth and average erect length is about 2inches more than average flaccid length. These figures would put me about average, neither a grower or a shower, an inch growth in girth an a bit over 2 in length (on an average day)
So when people say grower/shower what defines this?
Not sure what percentages of growth from flaccid to erect are qualifiers for shower or grower. So I’ll just base it off my observations of other guys from past locker room or common shower rooms and noticing how I compare to seeing other guys. Some guys are definitely showers compared to me
My penis in a completely flaccid state, it’s pretty small and if in a somewhat cooler environment, my penis and balls both will be pretty retracted. Almost to a point of what could be close to being tucked. I’m maybe 2-3” exposed length at most and minimal girth at that point. But once aroused and fully erect I’m a little over 6” long and girthy enough that my wife is totally happy with it. Never really measured my girth size.
There’s no hard definition (pun intended) but as someone who identifies as a grower I consider what is the default penis I find when I drop trou in the bathroom? Not scientifically average, but anecdotally is the penis closer to my erection size or farther away from it?
Of course there’s a whole range: in the winter I may retreat and find less than an inch of shaft exposed, plus head. Most of the time it’s about 4 inches. My flaccid girth is also generally 4 inches. I know by comparison that my flaccid is bigger for about an hour post orgasm, or first things in the day after morning wood goes down, hanging 6 or more inches and closer to 5.25 girth. That is not my default penis, but it is my first-hand experience of what I would expect to see all the time if I was a shower.
I think it’s just a pretty loose - floppy, if you will - categorization of how dramatic of a difference is there between what you’d see/show off while changing at the gym vs what shows up for sex/masturbation. I guess the whole conversation assumes that there’s some group of people whose penises don’t get noticably larger in arousal, just harder. In a quick screen of these comments I think I only saw two folks talk about partners or exes who were showers, and @Oldman noted from visits to naturalist beaches almost everyone appeared to be growers.
The final thought there, then, is that it may be a lot of perspective of what makes for a apparently large flaccid penis, given I’ve never measured someone else in the locker room. There is a strange perspective trick in what you see looking down at yourself vs across the room at someone else and how the things across the way apart bigger, or, more actually what you see looking down gets foreshortened out of perspective. I have a similar experience with my feet: looking down I think they’re rather average, then I see my shoes off by themselves and I’m like, “those are freaking massive!” Weird example, but I think it’s the same thing. So perspective is screwy and honestly it’s probably been since high school locker room that I saw much variety of penises flopping around anyway.