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 jewelry rings.
Instruments for measuring
A stick analogous to sizing
You can determine the size of rings by using a paper, metal, or plastic sizer for rings (a gauge), or by measuring the diameter of the ring already installed.
Ring sticks are used to determine the diameter of rings' inner edges. They are typically made from delrin, plastic or wood, but may also comprise different substances. Rings can be made using digital sticks to measure exact measurements.
Measuring systems
International standard
ISO 853:2016 defines standard sizes for rings as their inner circumference measured in millimeters. The ISO sizes are used to measure the circumference of a ring in Austria (France, Germany, Belgium and Scandinavia (Norway. Sweden. Denmark. Finland. Iceland.)

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