0.030" thick Alloy 510
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 stablizing the edges.