You can find out which necklace length you need by measuring one of your own necklaces that suits the look you want to accessorise. If you don't have the right necklace to hand, you can use a piece of string to determine the length you want by draping it around your neck. Find the point on your décolleté where the necklace should end. Do remember that you might need to consider the size of a pendant as well. If the length and position is right for your neckline, you can now measure the piece of string in centimetres. The necklace lengths are listed in centimetres in the s.Oliver online shop too.