Features: Crafted with high accuracy calipers and multiple cubic zirconia gauges, this jewelry sizing set ensures measurements for gemstones comparisons in professional setting. Sturdy synthetic cubic zirconia components mimic diamonds brilliances while offering scratch resistant performances, pair with a portable case for organized jewelry shop operations. Addition for jewelers, associates, and designers requiring tool for rings sizing, customes jewelry creation, and client consultations. Streamlines jewelry packaging, boutique displays, and trade show presentations with instants visual size matching between diamonds and cubic zirconia stone. The graduated measurement systems simplifies stone comparisons for engagement rings, earrings, and pendants, maintaining professional standards across retail and workshop environments. Specifications: Materials: Zirconia Type: As Picture Show, Ten Type to Choose Size: 19.5x4cm/7.68x1.57inch Package Includes: 1pc Zircon Diamonds Comparison Rule Set note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.