This device is an accessory to be used with any of my vibrator sleeves that have the 18 mm diameter by 60 mm tall hole. I measured four different door knobs in my apartment and tried to make a single design that would accommodate them. Thus, some may be a bit loose and I suggest taking up the space with craft foam or mounting foam tape. Suggest printing at .2 mm height with supports and make sure you turn bridging off so your slicer will generate all needed supports. Make sure to clean the supports up really well around the print in place hinge before you attempt to fold it. You may need to use a screw driver to pry the tab a bit to remove from knob. Not responsible for any damage to your door knobs!
135 mm long by 50 mm wide by 117 mm tall