Check the listing for details. 40 Pack 12mm Adjustable Blank Rings, White, Light Gold, Brown, Copper. Condition: New. Listed at 17.09 USD. What is this?Adjustable blank rings for creating custom DIY jewelry. Perfect for embedding resin, photos, or rhinestones. Suitable for personalized gifts on birthdays, Christmas, Mother’s Day, and other special occasions. What will I get?You will receive a 40-pack of copper-made blank rings(White*10, Light Gold*10, Brown*10, Copper*10), The inner diameter of each ring is 18mm (0.63") and the ring tray size is 12mm (0.47"). Rust-resistant and lightweight with a smooth surface. Each ring has an adjustable band to fit most finger sizes.Are there any advantages of the product?Reliable Material: Crafted from Copper, these ring blanks are rust-resistant and lightweight. The smooth surface ensures comfort and prevents skin irritation.