Two rings:

-The matching band:Curved marquise opal wedding band solid 14k rose gold cluster chevron 6 stone moon stacking anniversary wedding ring band women gift 

marquise 1.5x3mm lab opals and round moissanites
Size 4.5 and platinum
Adjust the curved of the band to match the main ring

-The band:5mm White opal wedding band mens fire opal ring band anniversary gift for him her unique engagement ring women October birthstone ring

The band width is 6mm and ring size 7