Men's Six-pointed Star Ring1. Color: steel color2.Material: stainless steelWhy choose stainless steel: 1. No rust; 2. Not Allergic; 3. Powerful of anti-acid,anti-alkali; 4. No deformation; 5. Do not fade.Ring Size ReferenceSize 7 =Inner diameter 17mm = 53.4 mm Inner circumferenceSize 8 =Inner diameter 18mm = 56.5 mm Inner circumferenceSize 9 =Inner diameter 19mm = 59.7 mm Inner circumferenceSize 10 =Inner diameter 20mm = 62.8 mm Inner circumferencesize 11 =Inner diameter 21mm = 66 mm Inner circumferencesize 12 =Inner diameter 22mm = 69 mm Inner circumferencesize 13 =Inner diameter 23mm = 72.3 mm Inner circumference