The ring sizing used on Daintynine is in US standard.
Use a measuring tape to measure the circumference of your finger, making sure that it is a snug fit. Then use the chart below to get your ring size. If you do not have a measuring tape, use a string and mark the end with a pen. Then measure the length of it on a ruler.
You can also measure the inner diameter of an existing ring that you have with a ruler, and use the chart below to get your ring size. However I will strongly recommend using the measurement of the circumference of your finger as it is usually more accurate.
|Circumference (mm)||Inside Diameter (mm)||US Standard|