I would think PIV only becomes an issue once you get past 8.5 BPEL x 6 girth. It seems like most women can handle anything up to that size, even if some preparation and a slower start is required.
For blowjobs, it’s going to depend on the woman. My pre-PE girth was about 4.75-5, and even then there were some girls who couldn’t fit it without the dreaded teeth scraping my shaft. Others took most my length with ease, at least for a few seconds at a time. Lengthwise, my pre-PE BPEL was about 6.75-7, and out of 10+ women, only one has ever been able to deepthroat me. That’s my wife, and even when she does take it all, she can only go for a short while before she starts to gag or complains about her jaw hurting. I am going to start training her to take a nice throat fuck. I can imagine that guys with 6 inches or more girth have trouble getting good head—there’s a lot of posts about this being an issue on r/bigdickproblems.
For anal, also depends on the woman, but I think a lot of them are going to give a hard no if the guy is above 6 BPEL and above 5 girth, whereas they might be more open to it with average and smaller guys. I’ve only done it with one woman. I was flat out refused anal by other girls who said it was too big. My wife had it with her ex, but she says he was smaller than me. She’s given me a hard no on anal more than once, even though I have promised to go very slow and use tons of lube. She says she would like to, but doesn’t want to risk the injury.
Start: BPEL 6 3/4 MEG 4 3/4 BPFSL 6 7/8
Goal: at least 7 1/2 NBPEL x 5 1/2 MEG.
Perspective is everything. Progress thread: From anxious to confident