A note about the length of these necklaces:  Strands of pearls tend to be sold in 40cm lengths (give or take).  The process of knotting adds a little bit of length, as does the addition of a clasp but the resulting necklace is still relatively short - 42-45cm.  

My necklaces have all been finished with simple clasps to allow for the addition of an extender chain if extra length is required.  Please don't hesitate to ask for an extender chain if one is not already a part of the design.  (NB: this may alter the price of the necklace a little)