I've been on for three years. mine doesn't stick out of the folds or anything (not sure what the average is for everybody) so mine didn't grow much and probably won't anymore which is fine with me. BUT I could definitely feel a difference/could feel it get a bit bigger, because when I'm aroused I can feel it more and feels way more noticeable than it did before HRT. There's no difference to me when it comes to anything else besides sex, not really noticeable