It's a woman's prerogative to change her mind & with this beautiful ring you'll be able to follow your whims as you wish by changing the stone whenever you like. This ring has an Atelier de Famille patent. made from solid silver, it is accompanied by 2 semi-precious stones of your choice. The total height of the ring is 2.5cm, its outer diameter is 2.2cm (for size 50). You can choose two 12mm diameter stones for this ring. Let us know your finger size & you will receive your ring in a jewellery case, with the 2 interchangeable stones. Changing the stone is really easy: take out the stone, tighten the ring manually & clip the new stone. The clicking sound will ensure that the stone is correctly inserted. Don't know which size is best for your finger? Measure around the base of your finger with a piece of string, 5.2cm corresponds Approx. to a size 52, & so on. If in doubt, take the larger size.