I think I'm either stupid, or doing something wrong. I have just over 7.5 length, as measured by ruler from top. And after wrapping a string around my girth midshaft (which is most of the girth), I measure it to be just over 6.5 inches around. Base girth, however, appears to be 5.5 inches. Apparently this is the higher end of average. Why does it look small when I look down on it?