Size: 10 mm. For detailed size information, please refer to the pictures. The pictures are for reference only; please check the above detailed measurement to choose the correct size, and allow 12 mm differences due to manual measurement. Thanks. Item color displayed in photos may appear slightly different on your monitor due to calibration differences. Small items, please keep away from children under three years old to avoid choking hazards. Color: KC Gold. There are 5 colors to choose from, so you can pick the color you like to make crafts. Material: Iron, durable and longlasting. Making kits are made of stainless steel that are rustproof, anticorrosion and stainresistant, nontoxic and safe for your skin. 100% Brand And . Package includes 100Pcs (Pack), enough for daily use and replacement. Usage and benefits: Ideal for making earrings and DIY jewelry projects. Pair these components with your favorite beads or charms to create your own unique jewelry designs. Durable construction and rustresistant materials ensure longlasting use and reliable results. Safe for skin and suitable for crafting at home or in small groups; the stainless steel components add quality and value to your handmade pieces. 23 use scenarios: projects: design and assemble custom earrings for everyday wear or special occasions. Gift making: craft unique, handmade jewelry gifts for friends and family. Craft group or small : stock up on these 100piece packs for workshops, classes, or casual resale.