All these septum rings are sterling silver and are 18 gauge. Inner diameters are listed below. 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 - Laxmi - 8mm inner diameter 5 - Chevron - 8mm inner diameter 6 - Open Heart - 8mm inner diameter 7 - Moon - 8mm inner diameter 8 - Phoenix - 8mm inner diameter For hygiene reasons, nose jewelry is NOT returnable or exchangeable. Please make sure 18 gauge is an appropriate gauge for your nose, and 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.