Features: Ensure Gem setting with our precisions measurement tool, to accurately gauge Gem size and enhances jewelry making efficiency. Featuring high precisions scale and crafted from metal, this lightweight tool is easy to operate and suitable for various Gem shapes. Ideal for jewelry designers, jewelry enthusiasts, and DIY craft maker seek reliable measurement tool. Perfect for use in jewelry studios, workbenches, jewelry exhibition site, and DIY jewelry making classes. This indispensable measuring gauge is a must for anyone involved in the intricate art of jewelry creation, ensuring perfections. Specifications: Material: Carbon Steel Measurement Ranges: 1.0-6.5mm Package Includes: 1 Set Rings Sizer note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.