Ring Size
The size of the ring is a measurement used to define the circumference, or in some cases the diameter of the smart rings as well as jewellery rings.
Tools for measuring
A stick analogous to sizing
You can determine the size of rings by using a metal, paper or plastic ring sizer (a gauge), or by measuring the inner diameter of rings that are already set.
Ring sticks are instruments used to measure the inner dimensions of rings. They typically, they are made from plastic, delrin, wood or aluminium, or many other materials. To make exact measurements, digital ringsticks can be used.
Systems for measuring
International standard
ISO 8653 - 2016 defines standard ring sizes. It measures the circumference of the ring , measured in millimetres. ISO sizes are utilized in Austria and France, Germany (Belgium), France, Germany.

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