When wide-open isnt wide enough this elegant Spider Gag will get the job done. This sturdy metal gag consists of a steel ring with four curved metal legs attached to the ring. The gag and legs prevent the mouth from closing, leaving your subjects mouth open wide for whatever you wish to put in it. The diameter of the ring measures 1.7-inch and the gag connects to a vinyl strap that buckles in the back to keep the gag firmly in place. One size fits most.