Stainless Blue w/Diamond Cut Edges 6mm Comfort Fit 316 Grade Stainless SteelThe manufacturing process allows for the cliam that these rings are from one of the few companies in the country whose quality control standards meets or exceeds Federal standards. The inclusion of our Lifetime Certificate with each piece is your assurance of our consistency in meeting Federal standards.Approx. Total Item Weight: 1.12 oz. Special Finish Stainless Steel High Polished Blue w/Diamond Cut Edges 6mm Comfort Fit 316 Grade Stainless SteelAvailable Sizes:Size: 4, 5, 6, 7, 8, 9.10, 11, 12, 13, 14Ring SizesItalian sizeFrench sizeAmerican sizeEnglish sizeDiameter in cmCircumference in cm141B1.304.08241.502D1.334.18242D1.334.182.5042.752.5E1.354.243431.364.274443F1.404.405451.434.495.5045.503.5G1.454.55646H1.464.586.7546.754H-1/21.474.62747I1.494.688484.5I-1/21.534.80949J1.564.909.5049.255J-1/21.584.961050K1.605.0210.550.505.5L1.615.061151L-1/21.625.0911.551.506M1.635.1212521.655.1812.552.51.665.2113536.5N1.685.2813.553.501.705.3414541.725.4014.554.507O1.735.4315551.745.4615.555.501.765.5316567.5P1.785.5916.556.501.805.6517578Q1.815.6817.557.501.835.7518581.855.8118.558.508.51.865.841959R1.885.9019.559.7591.905.972060S1.926.03