Collar (30 to 32cm)
Multi-strand of pearls worn tightly pressed against the middle of the neck.

Choker (36 to 40cm)
A single strand of large pearls, or a multi-strand of small Akoya or freshwater pearls.
 

Princess (40 to 50cm)
The most common length for a pearl strand. Very good for high or plunging necklines.

Matinee (50 to 60cm)
Often strung to contain two hidden clasps, so that it can be worn either as a long necklace (casual) or as a necklace and a bracelet (business attire).

Opera (70 to 90cm)
About twice the length of a choker, it can be worn as a single strand, or also as a versatile two-strand choker.

Rope (100cm or longer)
This luxurious length can be both elegant and sexy. It can be made with several clasps, enabling it to be broken down into different necklace and bracelet combinations, or doubled and even tripled to create a stunning multi-strand choker. This versatile length may also be tied in a knot for a charming modern look reminiscent of the height of 1920s flapper fashion.