This pendant can be customized to hold from 1 to 7 synthetic 2.5 mm birthstones. Please scroll down to "PRODUCT CUSTOMIZATION" text box and list desired birthstones and their placement in order #1-7 according to the numbered images. 

Stone Placement Chart

Available birthstones: January - Garnet, February - Amethyst, March - Aquamarine, April - White Zircon, May - Emerald, June - Smoky Quartz, July - Ruby, August - Peridot, September - Sapphire, October - Pink Tourmaline, November - Citrine,  December - Blue Topaz.