Round sterling wire is 8 gauge AWG, which is 3.26mm. Inside diameter (ID) is the mandrel size, not the finished ring size, in millimeters. AR is the aspect ratio. RPO is the number of rings in a troy ounce. Rings...

Round Argentium wire is 8 gauge AWG, which is 3.26mm. Inside diameter (ID) is the mandrel size, not the finished ring size, in millimeters. AR is the aspect ratio. RPO is the number of rings in a troy ounce. Rings...