The measurements are given in both inches and millimeters, however, the metric system of millimeters is much easier to use with a standard ruler. You are also matching up the ring to the circle by eye, which isn’t 100% accurate.ĬLICK IMAGE BELOW FOR PRINTABLE RING SIZER (Word document)īelow is a ring size chart that specifies the diameter of the ring (the measurement across the ring) and the circumference of the ring (the measurement around the ring) for each size. The image should print at 100% and you should verify the accuracy of the ring size chart by confirming that the line shown on the chart measures 125mm. Please note that when using the ring size chart below, there are many factors that can affect the accuracy of your measurements. It is recommended to buy a metal ring sizer, not a plastic one, since it is most similar to a metal ring. If you would like to use a more substantial and accurate ring sizer at home, ring mandrels and ring sizers are available for sale at a crafts store like Michaels or Joann, or you can find a wide selection on Ebay and Amazon.
#Ring sizer tool online professional
Please note that although you may use this ring sizer to get a fairly accurate measurement of your ring, it is always advisable to have your ring sized by a professional jeweler using one of the professional tools shown above – a ring mandrel or a ring sizer – to determine the exact size of your ring.
To determine the most accurate ring size, the ring should cover the circle so that the black circle touches the inside of the ring. Metal ring sizers in narrow and wide width to measure ring size.īelow is a ring size chart that can be used to determine the size of a ring.