17mm, Just short of 11/16 Inch, 0.66929 Inches. 18mm, Just short of 3/4 Inch,
0.70866 Inches. 19mm, Little under 3/4 Inch, 0.74803 Inches. 20mm, Just short of
... White Half Round Cultured Seed Pearl · 14k Yellow Gold Spring Ring Clasp ·
Hypoallergenic Small Clear Rubber 3mm Ear Wire Clutches or Guard, 72 Pairs ...