Tool Size:about 25mm in diameter, 260mm long;There are 2 Types of Measuring Size on the Ring Mandrel include American Size(2~15), Hong Kong Size(3~34).Quality Material:This plastic ring stick mandrel is made of high-quality plastic material, not easy to break.essential tool for jewelry makers, artisans, and professionals in the field.Applications:The mandrel features clearly marked size increments, allowing users to precisely measure and resize rings with ease. The smooth surface of the mandrel prevents scratches and damages to the rings during the sizing process.Design: Its ergonomic handle provides a comfortable grip, makes it easy to hold the ring securely,There is a ring on the top for easy hanging after use.Ideal for Jewelry Making:Whether you're a professional jeweler or a DIY enthusiast, this tool is perfect for creating, adjusting, and repairing rings with precision and ease.