These sumptuous recycled 9ct gold stacking rings can be bought as a set or individually. You can also request a custom order for ones to be made in the stones of your choice. The large oval peridot is a 10 x8 mm stone , the round amethyst is 7mm and the rhodolite garnet 7x5mm. Just ask for a quote if you would like variations in the stones or sizes. The rings are made to order in your size. Orders take 3-4 weeks.