So we are pretty close to 100 responses. Unfortunately a lot of folks filled out the survey but also stated they only wore the cage uninterrupted for a week or so, then took it off for release or some other reason at least briefly. I'll be filtering these answers out since they don't really add to the discussion. As for my own experience and log - unfortunately there is going to be a delay. It seems I've underestimated the size of my package a bit and the ring that arrived is just too tight. I've ordered a sizing kit so I can try out several rings and then order a new one.
I did take pre-chastity measurements though and it looks like erect I'm about 13.4 cm (5.3") if pressing into the bone with conviction (maybe I should be pressing less hard?), and flaccid (although ALWAYS changing on me) is about 7.4 cm (2.9") . However, this can at times be significantly smaller (around 4 cm, or 1.6"), if I were to guess, and I'm always a little excited when naked so it's a bit of a challenge deciding what is "normal". I haven't decided if I should add girth to the list or not, but it is quite small - honestly the smallest I've seen, which seems a little out of place given that I have seen shorter penises.
Aside from the survey and what everyone else posts, the entire purpose of me keeping this journal is to relay my personal experience. My bias is that the idea of (temporary) shrinkage is a turn-on, but with actual measurements and continuous uninterrupted chastity I hope to relay only factual data instead of relying on anecdotal statements that lack enough meaningful background information to be truly useful. I can post measurement pictures if anyone thinks it's necessary.