5 1/2 or less is to thin for me. and even that isn't really been much fun for me in the past. has to be at least 6 1/2 or bigger but not beer can thick. as i almost have that now with hubby, and some times its to much an he has to take it slow every now and then an thats hard to do when i just want it fast an hard ram rod type sex some times. and i have to work up to taking him so i can walk the next day sort of lol. so their is such a thing as to big. as least for me. but theirs nothing like being just a tad sore the next day then i know i really been fucked good. and in a good way.