Ha, after reflecting over the 5 recent soft cock/doorknob pics I posted in this thread, I find that doorknobs can vary slightly : the first two I posted were made using the doorknob to my laundry room, with 2.125 inches diameter and 6.7 inches girth! The last three I posted were made using the doorknob to my bathroom, with 2 inch diameter and 6.3 inches girth. The picture results were much better using the standard 2 inch diameter knob and swallowing the standard knob was far easier. So, if you are contemplating taking a shot at tdnet's doorknob challenge here, be advised, measure that darned knob!