Once at 7\"
Erect base 6\" neck
Girth, the problems start. Above 7\", and one\'s options are severely limited to bigger vaginas which are due to child birth and/or genes. Anal and BJ\'s have the same outcome at and above 7\" base, 6\" neck.
For me, I found out that at about 6.75\" base
Girth tapering to about 5.5\" was perfect for my ladies of young no children age. But once I reached or passed the 7\" base and 6\" neck, my options were limited, for sure no anal and BJ\'s were done for a short time and only at about 1\"-2\" of
Erect length in the mouth.
I have always said that a taper is very usable for small to bigger sized vaginas. However, I do know that some men do not like the tapered look and prefer the cylindrical look.
As mentioned above by GSXR, a quicky becomes a problem if one is at or above 6.5\" neck to 7\" base without major foreplay and lube.
Below 6.5\" neck and 7\" base May be good for most average sized vaginas but not for the small or Asian ones.
Perhaps the most comfortable and easy penis size for quickies, anal, BJ and everything else is around 6\" base tapering down to 5.5\" neck.
Also, Length is important to a certain extent, I\'d say 6\"-7\" EL may be the best length for most women.