How To Measure A Man's Necklace. This is a common length for chains because they offer more breathing room. For example, if a man's neck is 17 inches, then a 19 inch necklace would be the smallest size expected to fit comfortably.
Falls a few inches below a collar bone and can be worn over or under a shirt. Our bodies come in all shapes and sizes, so the first step for a man purchasing a necklace is to measure his neck or collar size using a tape measure. Whether it hangs above the shirt or hide underneath will give you a total different look.
The shortest length necklace that will fit around that man's neck is the measured length plus two inches.
To measure the chest, button the shirt and lay it flat. Measure from the middle of the button hole to the center of the collar button. Most common men’s chain is 24”. * (men necklace, most common length is 18 inch for men between 5.5 ft and 5.9, 165cm and 175cm tall.)