Ring Size
The size of the ring is a measure that indicates the circumference, sometimes called the diameter of smart rings and jewelry rings.
Instruments for measuring
A ring stick that is analogous to sizing
Ring sizes can be measured with a plastic, paper or a ring sizer made of metal (as an indicator) or by measuring the inner diameter of a ring that already fits.
Ring sticks are used to measure the rings' diameters inside. They are generally made of plastic, delrin or wood, but may also comprise different materials. For precise measurements, digital ringsticks could be utilized.
Measuring systems
International standard
ISO 8653 - 2016 defines standards for sizes of rings. It is measured by the diameter of the ring in millimetres. ISO sizes are commonly used in Austria and France, Germany (Belgium), France, Germany.

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