The largest of the cabinet glass knobs is the two-inch knob.,It is comparable in size to the crystal doorknobs of the early,1900s. This extra large glass knob is considerably larger than,the 1 1/2″ large glass knob. It is a half inch wider and a 1/4″,taller. Our customers use these on kitchen cabinet doors,,pantry doors, or large drawers. ,Consequently, we don’t see as many of these giants. ,If one uses the 2 1/2″ bolt, there is 3/4″ threads left to fasten,to the drawer or door. Be sure to measure the width of your,door or drawer before ordering bolts.