Chaton Crystal Rhinstone Iris Blue PP24 (3.00-3.20mm) Glass rhinestones offer excellent light reflection with a pointed front and back and additional flash created from the foil back. Foil color varies. Machine-cut for consistent size and shape. Ideal for use with polymer clay and Apoxie® Sculpt. Size PP24 (3.00-3.20mm), approximately 3.1-3.2mm.