According to the wideness of your V neckline, choose a drop or a pendant that perfectly flows into it.
Photo Courtesy of Piaget
 

If you are wearing a top or a dress with a round neckline, opt for a bold necklace. The wider the round neckline is, the bolder the necklace should be.
Photo Courtesy of Chanel
 

With a tight boat neckline, choose a sautoir that balances the high, horizontal cut.
Photo Courtesy of Chaumet
 

If you are wearing a collared button-down shirt, match it with a statement necklace and avoid a long necklace that completes its vertical button line.
Photo Courtesy of Cartier
 

If you are wearing a crewneck top or dress and you have a long neck, you have the opportunity to wear a collar necklace. If this is not the case, wear a sautoir or a statement necklace that lengthens the neckline.
Photo Courtesy of Chopard
 

With a strapless top or dress, opt for a slightly longer statement necklace that leaves a half-inch space between it and the neckline.
Photo Courtesy of Tiffany & Co.
 

If you would like to wear something simpler with a strapless top or dress, you can choose a simpler statement necklace.
Photo Courtesy of Bulgari
 

If your outfit has a V-shaped back neckline, turn back your sautoir and make a stunning and sophisticated statement.
Photo Courtesy of Chopard