Description: Type: Titanium Devil Eye Men Ring Material: Titanium Color: Silver、  Green Weight: About 16.5g Size(US): 8、 9、 10、 11                       Circumference      (mm)            Diameter(mm)             China             USA             UK             Australia             Japan             German             Russian             France             Brazil             Swiss                          48           15.27           8           4.5           I ½                I ½           8           15 ¼           15 ¼           49           8           ...                   49           15.7           9           5           J ½           J ½           9           15 ¾           15 ¾           50           9           9                   51           16.1           10           5 ½           L           L           11           16           16           51 ¾           11           11¾                   53           16.92           13           6 ½           N           N           13           17           17           54           13           14                   55           17.35           14           7           O           O           14           17 ¼           17 ¼           55 ¼           15           15¼                   56           17.75           15           7½           P           P           15           17¾           17¾           56 ½           15.5           16 ½                   57           18.19           16           8           Q           Q           16           18           18           57¾           16           17¾                   58           18.53           17           8½           Q ½           Q ½           17           18 ½           18 ½           ...           17           ...                   59           18.89           18           9           R½           R½           18           19           19           59           18           19                   61           19.41           19           9½           S½           ½           19           19½           19½           ...           19           ...                   62           19.84           20           10           T½           T½           20           20           20           61.5           21