GB/T 11888-2014 in English

《GB/T 11888-2014首饰 指环尺寸 定义、测量和命名》由TC256（全国首饰标准化技术委员会）归口，主管部门为中国轻工业联合会。
本标准规定了指环尺寸的定义、测量、命名及标志。
本标准适用于指环尺寸的测量与命名。

Jewellery - Ring-size - Definition, measurement and designation

1 Scope

This standard specifies the definition, measurement, designation and marking of ring-size.

This standard is applicable to the measurement and designation of ring-size.

2 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

2.1

ring-size

the inner circumference of the ring, expressed in mm

2.2

numbers of ring-size

a method of representing the ring-size with the numbers 1# to 36#, also known as finger-size

3 Measurement

3.1 Measuring tools

Ring-stick (as shown in Figure 1), shall meet the following requirements:

—— effective range: 160 mm ± 0.5 mm.

—— measuring range: 41 mm to 76 mm;

—— material: metal, or material with equivalent wear resistance.

3.2 Measuring method

Put the ring on the ring-stick (see 3.1) with the inner side of the ring tightly attached to the ring-stick upright. Take the scale value closest to the position where the inner side of the ring is closely attached as the ring-size. Round off the calculation result to single digit, in mm.

Example 1: If the scale value of the position where the inner side of the ring A is closely attached to the tapered ring-gauge is 55, the ring-size of the ring A is 55 mm;

Example 2: If the scale value of the position where the inner side of the ring B is closely attached to the tapered ring-gauge is between 54 to 55, the ring-size of the ring B is 55 mm;

Foreword i
1 Scope
2 Terms and definitions
3 Measurement
4 Designation and marking
Annex A (Informative) Comparison of clause numbers between this standard and ISO 8653: 1986
Annex B (Informative) Technical deviations between this standard and ISO 8653: 1986 and the justifications
Annex C (Informative) Correspondence between ring-sizes and numbers of ring-size