This adjustable ring setting is especially made to fit the SWAROVSKI square Fancy Stone 4470 in 12mm. Using the 12mm Fancy Stone of your choice, simply add a drop of jewellery glue into the cup and place the stone inside. Leave it to dry to create a simple but elegant ring. The ring is 3mm wide and 20mm diameter (but adjustable). These high quality settings are handmade in Europe. Nickel Free. Stones sold separately.