These are solid copper alloy 110
They are 0.030" thick
Size: 7/8” x 1.41” with 0.35” hole (22.2mm x 35.8mm,8.9mm hole)
Ring size for standard overlapping scalemail pattern: 16g SWG 5/16" ID
Scales per square foot: approximately 300
You will need 2 rings per scale; more if you are stabilizing the edges.