GENERAL INSTRUCTIONFind a ring that properly fits the intended finger.Use a scale to measure the inside diameter of the ring.And, If the ring falls between any two sizes, then order the larger size.Still hard to find your size, then you can contact us. Feel free to share your queries with us.MEASURE YOUR EXISTING RINGSelect an existing ring that fits the desired finger.Measure the internal diameter of the ring (in mm).Use the above chart to determine your ring size.