Standard lengths for men's necklaces are:

1.Men with smaller neck sizes may choose an 18-inch (45 cm) chain. This length should come down to the base of the neck.

2.The most common length for the average man is 20 inches (50 cm), which comes down to the collarbone.

3.Choose a 22-inch (55-cm) chain if you want something that lands just below the collarbone.

4.For a necklace that comes down to a point just above the sternum, go with a 24-inch (60 cm) chain.

5.A necklace measuring 28 to 34 inches (71 to 86 cm) hang at or below the bust.

6.Take into account that pendants add length to necklaces. Pendants can affect both the overall length and weight of a necklace. When the pendant is placed on a chain of known length, the bottom of the pendant—and the necklace overall—will extend down your front by the length of the pendant. In other words, if you have a 2 inch (5 cm) pendant placed on an 18 inch (45 cm) chain, the necklace will land 2 inches (5 cm) below the collarbone.