The best way to indicate which size to purchase is by measuring a ring you already own using a standard ruler. Measure the inside of the ring from one side to the other in millimeters, this is your rings 'inside diameter' - now that you have this you can use our sizing chart below.
BAND WIDTHS: Rings with thinner bands tend to run a bit larger, whereas thicker rings have a more snug fit. The more metal around your finger, the more space it takes up and the tighter it fits, ie: a thin size 6 ring will not fit the same as a thick size 6 ring.
NOSE RING DIAMETER (INTERNAL DIAMETER)
NOSE RING GAUGE (THICKNESS OF WIRE)