GB/T 11888-2021Jewelry ring size definition, measurement and naming (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules of Standardization Documents" drafted.

This document replaces GB/T 11888-2014 "Dimensional Definition, Measurement and Naming of Jewelry Rings", which is consistent with GB/T 11888-2014 In addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Changed the scope of application (see Chapter 1, Chapter 1 of the 2014 edition);

--- Increased the diameter and deviation of the ring size, the scale representation of the ring stick (see Chapter 4);

--- Increased the measurement of the inner ring profile of the ring (see 5.2);

--- Increased the measurement of the inner ring profile of the special ring (see 5.3);

--- Deleted Appendix B (see Appendix B of the 2014 edition).

This document is modified and adopted ISO 8653:2016 "Jewelry Ring Dimensions Definition, Measurement and Nomenclature".

Compared with ISO 8653:2016, this document has more structural adjustments. Comparison list of structure number changes between two files See Appendix A.

The technical differences between this document and ISO 8653:2016 and their reasons are as follows.

--- Added the definition of ring number (see 3.2), which is in line with the actual situation of my country's jewelry industry and is easy to apply;

--- Added a schematic diagram of the ring stick (see Figure 1) to help intuitive understanding;

---Added the corresponding relationship between the ring number and the ring size, and the scale representation of the ring stick (see Chapter 4), which is in line with the actual situation of my country's jewelry industry. , easy to apply;

--- Changed the naming and logo (see Chapter 6) to adapt to the development of my country's jewelry industry. The following editorial changes have been made to this document.

--- Added the unit description of ring size (see 3.1);

--- Added Appendix A (informative) structure number change comparison list;

--- Added appendix B (informative) comparison relationship between ring size and ring number.

1 Scope

This document specifies the definition, measurement method, nomenclature and marking of ring dimensions.

This document applies to the measurement and naming of closed ring dimensions.

2 Normative references

There are no normative references in this document.

3 Terms and Definitions

The following terms and definitions apply to this document.