The outer diameters of {HEAD ~ the magnets} must fit within {TAIL ~ the selected eyeglass rim diameters} and range typically from about 1.15 inch to about 2.0 inch 
The outer diameters of { HEAD ~ the magnets } must fit within { TAIL ~ the selected eyeglass rim diameters } and range typically from about 1.15 inch to about 2.0 inch
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH