Dimensionsouter Diameter: 48Mm; Inner Diameter: 38Mm; Thickness: 4Mm. Materialsdurable, Non-Rusting and Rust-Resistant Metal Compound (Iron, Copper, Stainless Steel) Curtain Clips Quantityset of 20 Pieces Including Grommets and Detachable Clips. Large Clip Rings for Hanging Curtains On A Curtain Rod. Extra Hardnessstrong Tension Clip for Heavier Applications, Extra Thickness and Hardness, Heavy Duty Design, Stronger Tension Clip Holds Heavier Curtains With No Problem. Wide Applicationthese Curtain Accessories Are Suitable for Most Types of Curtains, Such As Shower Curtain, Window Curtain, French Curtain and More. Description These Curtain Clip Rings Easily Slide Onto Any Metal Rod Up To 1.38 (35Mm) In Diameter. With A High-Tension Clip, You Can Easily Hang An Extra Heavy Curtain. To Hang Curtains With Pleated Needle Hooks, Simply Detach The Clip and Thread The Hook Through The Eyelet. The Inner Diameter Is Sizes 38 Mm. Please Make Sure The Size Is Correct When Purchasing.