In my flaccid state I am about 4" and 1.5" thick.. I have measured it several times at different periods. I have heard though that you should mark off half an inch for the cage length. I would really like to fit in the CB6000 (3.25" x 1 3/8")as it seems more discrete, but I don't think that's possible (?). The Curve (3.75" x 1.5") seems to not be so discrete and I am worried about it bulging.. is there anything you can do about this, or any experiences?