I've been obsessed (not too strong a word) with penis extensions and giving my wife something "huge." She keeps saying that I'm a good size and she likes it, but like most psychotic men I secretly don't believe her. I've tried a number of sleeves and the good news is that they keep making me feel better about myself. This one is no exception. I'm about 6" and 1.5" across. Forget the rigid inner insert. It useless unless your 3" or less and quite skinny. However, with the rigid inset taken out the flexible outer body works well. It definitely make me a bit bigger and thicker, but not ridiculously so. The first time I used it on my wife I didn't exactly tell her first - just got her heated up and then put it in. She definitely liked it and seemed to notice that something was a little different, but she honestly told me after that she wasn't aware that it was anything other than "normal me." I don't think she was sparing my feelings, I just think that it adds enough that your wife will notice something is different and be pleased, but not so much that she will be in total pain. But, if your penis is a good deal below or above 6" it won't be a good fit.