Before PE…never measured, but I would guess 1-2 inches depending on temperature.
And there is the reason for your insecurities. It also seemed the womens negative comments were also on account of your flaccid. You also seem to be very jealous of men with a larger than average flaccid. A 6 inch flaccid is just ridiculous. Though the guy may have been a shower and there is a chance he didn’t gain any length at all when he got hard.
BTW with a starting length of 6.75 BPEL there is no way your flaccid was 1-2 inches. I’d say you were around 3-3.5 depending on temperature.
One thing that I’ll never understand is why men or women even give a damn about flaccid length. I don’t take public showers because I don’t want to see a bunch of old naked men nor would I want to get naked in-front of them. Whenever I’m about to have sex with a woman I’m already almost hard so she’ll never see my flaccid anyways.