What size septum ring do you get pierced with? What is the best metal for a septum ring?.What types of jewelry is used for a septum piercing?.How do you measure the diameter of a septum ring?.How do you measure your septum piercing?.What size septum ring do you get pierced with?.Others may just be too large to fit your personal aesthetic because the design hangs low enough to touch your upper lip. Some designs will take up part of the inner diameter, which is incredibly important to know because it will affect the way the ring fits. You will also need to take the size of the actual design into consideration. For example, if you’re buying a hoop you would see it listed like this: 8mm (5/16”). The inner diameter will usually be listed in millimeters or inches if you’re buying in the US. The gauge will be written like this: 16G, 16Ga, or 16 gauge. The gauge refers to how thick the jewelry is, and the inner diameter is a vertical measurement that’s taken in a straight line from one inside edge to the other inside edge. To buy a septum ring that fits properly you will need to know which gauge you wear and what inner diameter fits you well. There are several important size considerations to keep in mind for septum pieces. If you’re going to buy jewelry online, then you need to know which size septum ring you need.