If you don't know the size of the ring or wedding rings, you can use the size chart on this website. In order to do that, you should measure the inside diameter of the ring you are currently wearing and find a corresponding "jewellery measure" in the chart.
The "jewellery measure" is the size of the ring or wedding ring and it should be given in the "comments box" with your order.
With wider wedding rings (approx. 0,39in) you should give us one size bigger than your actual size. It will ensure a greater comfort of wearing.