Ring Size
Ring size is a measure used to denote the circumference (or sometimes, the diameter) of jewellery rings and smart rings.
Instruments for measuring
A ring stick that is analogous to sizing
Ring sizes can be measured through a paper, plastic, or metal ring sizer (as gauge) or simply by measuring the diameter of a ring that is already fitted.
Ring sticks are tools used to gauge the size of a ring. They are typically made from plastic, delrin, wood, aluminium, or of different materials. Ring sticks that are digital can be used for highly accurate measurements.
Measuring systems
International standard
ISO 853:2016 defines standard sizes for rings in relation to the inner circumference of the ring as measured in millimetres. The ISO sizes can be used to measure the circumference of a ring in Austria (France, Germany, Belgium and Scandinavia (Norway. Sweden. Denmark. Finland. Iceland.)

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