Take finger as an example, the neck and wrist can refer to this method.

Step 1.

Wrap a string comfortably around the desired finger.



Step 2.

With a pen or marker, mark the spot where the string or paper meets and feels comfortable.



Step 3.

Lay the string or strip of paper on a flat surface and measure its length in millimeters. This number is your finger’s circumference!



*The following is a comparison table of ring sizes by country