Ring Size
Ring size refers to the measurement that is used to indicate the circumference (or sometimes the diameter) of jewellery rings as well as smart rings.
Measuring tools
A stick analogous to the size of
Physical measurement of ring sizes is possible using the use of a metal, paper or plastic ring sizer (as an indicator) or using a ring's internal diameter.
Ring sticks are instruments that are used to determine the size of a ring, and generally made of wood, plastic, delrin, aluminium, or of various materials. Digital ring sticks are used for extremely accurate measurements.
Measurement systems
International standard
ISO 8653:2016 defines standard ring sizes by the inner circumference, measured in millimetres. ISO sizes are commonly used in Austria and France, Germany (Belgium), France, Germany.

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