This listing is for a reproduction 18th Century necklace made with medium white Shell Pearls. Shell Pearls are beads made from the nacre of Pearls so they have the weight and shine of real Pearls without the high cost. These are medium-sized 8mm beads. 

This short necklace (13") is finished with two rings on the end, which you run a ribbon through to tie it on. 18th Century necklaces were meant to be worn very short on the neck in a true choker fashion, so the ribbons allow it to be totally adjustable to your neck. Ribbon is NOT included, but if you would like to add some I have many options available in the millinery shop:  .75-1.5" ribbon is best for this item: 

In the final photo, Shasta is wearing this necklace paired with this double strand necklace: