How To Measure Chain Size Necklace. Take note that the chain thickness needs to be similar to the one you are purchasing. You will need a thin piece of rope or measurement tape or at least a thin stripe of paper of the appropriate length.
When choosing the length for yourself, you can measure a similar necklace chain that falls the way you want. 1)take a ribbon or rope with which you can surround your entire wrist Wrap it up around your neck (wrist, ankle, etc), depending on what you are buying.
This measurement should be your necklace chain length.
Falls a few inches below a collar bone and can be worn over or under a shirt. There are two ways to measure a necklace. If you already have a necklace whose length you like, you can measure it to help determine which size to choose. This site might help you.