When choosing a necklace, it can be tricky to find one that fits comfortably around your neck. Fortunately, there are some basic tips on necklace lengths. The standard chain length is 16 to 20 inches, which sits just between the base of the throat and the collarbone for most people. And just like style, the correct length for you is based on personal taste. It's also nice to have different sizes and styles of necklaces available for different occasions.