Here is a thread that that I submitted that may address your question:
There has been a lot of discussion on Thunders over the years as to how BIG you should be:
To be a porn star
To please your wife or lover
To assuage your size fretting
To please your ego
I am merely posing the question of proportional hierarchy as to evaluating how large you should be minimally in comparison to other parts of your body for a pleasing and reasonable relationship. Several threaders have hinted that genitalia should have hierarchical meaning based upon the importance of the use of the body part but also its relationship, proportionally, to the whole body. “Keirs” has requested whole body pictures with that in mind but with few takers. Most of us are here for bigger units—not for pleasing bodily relationships. Posters have objected to Keirs and promoted the idea of penis pics only. Forget that many would not submit pictures for fear of discovery.
There have also been discussions of proportional relationships of and within the penis itself—perhaps engaging the ” golden mean” as to width to length as it were a classical column.
Forgetting all that, what can be said that is reasonable? Well, maybe we should think as an artist and as a man of science at the same time…like the DaVinci of the proportional man-in-the-circle or that of the proportional man in the Durer litho.
Assuming a reasonable BMI,
(15 or less), you are naked in front of a mirror:
Placing your hands on your thighs with thumbs extended and next to your flaccid penis, if your penis is smaller than either of your thumbs, that should be the definition of “micropenis” from a proportional standpoint. No matter how much importance given by science of “opposing thumbs” in the developement of homo-sapiens, that does not trump the fact of the importance of the the penis as a tool of human perpetuity. It is fitting that your penis be larger than your thumbs. How much larger?
Now looking downward to you feet and appraising your size in girth to that of your big toe, considering use, as above, is it reasonable that your flaccid penis be at least as girthy as your big toe or larger? Indeed , I would hope so. (Big toes, as sex objects, are tethered together as a sensual trick in brothel lore but only as an adjunct to penis pleasure.) How about flaccid length? Returning to your extended fingers on your thighs, I would assume it to be reasonable on a Summer day that your flaccid length be at least as long or longer than your longest, (the middle), finger.
Any sizes smaller than what is outlined above, I think, is an open invitation to PE and the realm of the possible