YSL Creamy Round and Baroque Pear Shape Imitation Pearl Necklace with Rhinestone Accents has a double hook back closure. It measures approximately 19 inches closed. The large Imitation Baroque Pear Shaped Pearl is surrounded by Pave Rhinestones and falls 1 3/4 inches from top of necklace. It is flanked on either side by Clear Faceted Pear Shape Rhinestones. This piece is not adjustable in size, unless you restring it entirely.