The penis and is often discussed on here.
Back in 2014, a scientific study, called 'Am I normal' measured the the penises of 15,552 men.
https://pubmed.ncbi.nlm.nih.gov/25487360/
The average dimensions were as follows:
Flaccid: 3.16 inches
Erect: 5.17 inches.
Girth: Flaccid, 3.7inches. Erect, 4.59 inches.
Erection angle: 105.7 degrees. ( 0 degrees pointing towards your feet, 180 degrees pointing to your chin, 90 degrees pointing straight ahead.
This is why, since my op, I always keep a tape measure and protractor, on the bedside table.