All these faux septum rings are sterling silver. Inner diameters are listed below. You simply gently twist the ring, slip the end in one nostril and gently close to have a beautiful tribal septum look without the piercing. Please choose which of the following styles you would like (2nd picture shows style numbers) and select your choice (or choices) from the drop-down menu to order (this item/price is for one ring): 1 - Crown - 8mm inner diameter 2 - Durga Dots - 8mm inner diameter 3 - Triple Ring - 8mm inner diameter 4 - Phoenix - 8mm inner diameter 5 - Tribal Shield - 8mm inner diameter 6 - Moon - 8mm inner diameter 7 - Chevron - 8mm inner diameter 8 - Open Heart - 8mm inner diameter For hygiene reasons, nose jewelry is NOT returnable or exchangeable. Please sterilize before wearing. You are responsible for knowing what metals you are able to wear in your nose - please consult a dermatologist if you are unsure or have any questions.