Finish: 18k Gold-plated

Size 6: 16.5mm
Size 7: 17.3mm
Size 8: 18.2mm

Width:

Narrow: Ring Width: 0.2cm, weight 1.3g 
Middle: Ring Width: 0.4cm, weight 2.8g
Wide:   Ring Width: 0.5cm, weight 3.2g

Material: Gold plated on Stainless Steel