Product Material: ABS Plastic Inner Diameter: 4.6cm Outer Diameter: Approx. 7cm Color: Copper 1. Size 80pcs curtain ring. Inner diameter: approx. 4.6cm, outer diameter: approx. 7cm. These eyelet curtains are designed for 1-3/8 inch diameter curtain rod 2. Applicable Use for DIY to decorate your cloth, bags, shirt, shoes, curtains, draperies, pillows, etc. bag ring. 3. Material: Lightweight and sturdy ABS plastic material, wear-resistant, corrosion-resistant, durable to use, it will not lose color and better than metal and nickel 4. Instructions The diameter of the holes cut on the fabric is 51mm/2". No tools needed for installation, easily snap them together by pushing one half into the other. 5. Features Snap together easily. Great accessory for window curtain rod, window curtain ring, shower curtain ring, locker room door curtains ring, DIY backpack bag ring.