Ring Size
The ring size is a measurement that denotes the circumference or diameter of rings that are smart and jewellery rings.
Instruments for measuring
A ring stick that is analogous to sizing
Ring sizes can be measured using a plastic, paper, or metal ring sizer (as gauge) or by measuring the inner diameter of the ring that is already fitted.
Ring sticks are used to determine the rings' diameters inside. They are typically made from delrin, plastic or wood, and can also be made of several substances. You can use digital ring sticks to get exact measurements.
Measurement systems
Standard international
ISO 19865:2016 defines standard ring sizes according to the internal circumference of the ring , measured in millimetres. ISO sizes are used in Austria and France, Germany (Belgium), France, Germany.

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