UPDATE: almost 11 months after circumcision.
In my late teens to early 20s, the longest I've ever measured my uncircumcised penis (not counting the foreskin tip) is 6.0" with the ruler pressed against the pubic bone.
Got cut 11 months ago. My erections have felt restricted and shortened for the first few months. It would top out at 4.5" to 5". I recently measured myself this month while I was very hard with ruler pressed against pubic bone and I'm about 5.65" now. Not sure if I'm slowly gaining back length, OR I just wasn't pressing the ruler against my bone OR I wasn't "fully" hard other times I've measured.
I would like to get my other 0.35" back, but visually, my current size does not look bad. I've taken body pics from the side and I don't think I look "small." I think I look average/decent.
My incision line hasn't 100% smoothened out (yet?) so maybe, over time, I can gain back another 0.25-0.35" once the flesh flattens out? Also, I probably lost a fraction of an inch with age; I'm still young but I am not in my teens/20s anymore when I had more testosterone. That probably plays a small factor in length.