Build a Ring - Sterling Silver Step 1: Select an Inner Diameter InchesMillimeters 4/64 (1/16)5/646/64 (3/32)7/648/64 (1/8)9/6410/64 (5/32)11/6412/64 (3/16)13/6414/64 (7/32)15/6416/64 (1/4)17/6418/64 (9/32)19/6420/64 (5/16)21/6422/64 (11/32)23/6424/64 (3/8)25/6426/64 (13/32)27/6428/64 (7/16)29/6430/64 (15/32)31/6432/64 (1/2)34/64 (17/32)36/64 (9/16)38/64 (19/32)40/64 (5/8)42/64 (21/32)44/64 (11/16) 1.51.7522.252.52.7533.253.53.7544.254.54.7555.255.55.7566.256.56.7577.588.599.51010.51111.51212.51313.51414.51515.5161718 2: Select Wire Gauge 22212019181716151413121110 3. Purchase Select the units you want to work in (millimeters or inches) and then choose the inner diameter and wire gauge. Price per troy ounce: + Ring Designation Inner Diameter Units Gauge ss Metal Details