✔ Internal diameter: 1.5 inch/3.81cm. External diameter: 1.77inch/4.5cm ✔ Rings Thickness: 0.12 inch. Fits diameter 1.38inch curtains rod. ✔ Package Includes: Set of 40 Copper Metal Decorative Drapery Curtain Clip Rings 1.5 inch internal diameter ✔ For hanging curtain, party light, copper wire, christmas light hangers, flashlight, lanterns, tent and so on. Perfect for luxury hotels, restaurant, bar, meeting room, bedroom etc.