CSN EN ISO 8653

CSN EN ISO 8653 This International Standard specifies a method to measure the ring-size using a ring stick with defined characteristics, which is mainly used during manufacturing steps, and specifies the designation of the ring-size. NOTE - For jeweller-consumer relationships, the finger size is measured with a finger gauge set made up of a ring for each size with the same diameter and tolerance than the ring stick ones.
Original English text of CSN EN Standard.
The price of the Standard included all amendments and correcturs.