What is the most popular length of necklace?

Although opinions may vary, the most popular length of necklace is arguably 18 inches. Called princess-length necklaces, pieces that are 18 inches long usually hit just below the collarbone, so they can work with a wide range of necklines. The length is also good for showcasing a pendant. However, a shorter or longer necklace may be a better pick for some ensembles or for creating layered necklace looks. On 1stDibs, find a large selection of necklaces.