Chain Size Guide
First, decide how you prefer to wear your necklace, tightly, loosely, or as an exact fit.
Tight fit (45cm/18" or shorter) is recommended when you want a high-fitting necklace that holds the skin tight. These lengths are popular when it comes to thin and lightweight necklaces that appear above the shirt's neckline.
Exact fit (50cm/19.6" - 55cm/21.6") is the best and most popular option for most men. It allows the necklace to fit tightly and naturally around the neck. A precisely fitting necklace falls neatly on the collarbone and provides a small space for it to move. These necklaces can be worn inside or outside the shirt.
Loose fit (60cm/23.6" or longer) is a popular style among men who prefer their necklaces to sit low without restriction. Loose-fitting necklaces are usually worn on the outside of the shirt and often include a pendant or chunky look.
Exact fit (50cm/19.6" - 55cm/21.6") is the best and most popular option for most men. It allows the necklace to fit tightly and naturally around the neck. A precisely fitting necklace falls neatly on the collarbone and provides a small space for it to move. These necklaces can be worn inside or outside the shirt.
Loose fit (60cm/23.6" or longer) is a popular style among men who prefer their necklaces to sit low without restriction. Loose-fitting necklaces are usually worn on the outside of the shirt and often include a pendant or chunky look.
Tip: thin metal chains often look better when shorter in length (and larger necklaces better when longer). If you are in doubt, go with a 50cm / 20" length or another exact fit necklace, as these tend to gather the most compliments.