Some of the different types of necklaces, based on their design are:
Bib Necklace
A bib necklace is made multiple strands of stepped pearls.
Choker
35 centimetres (14 in) to 60 centimetres (24 in) long and sits high on the neck.
Opera Necklace
An opera necklace is 75 centimetres (30 in) to 90 centimetres (35 in) long and sits at the breastbone.
Princess Necklace
A princess necklace is 45 centimetres (18 in) to 50 centimetres (20 in) long. It is between choker and matinee length.
Sautoir or Rope Necklace
A sautoir or rope necklace is any necklace longer than opera length.
Uniform Necklace
A uniform necklace consists of pearls that appear to be all the same size, although normally there is a slight difference towards the ends so they appear to be in proportion.