Ensure the area you are placing the hook is clean and dust free. Peel off the backing, place the hook where you would like it, and hold down with some pressure for 2~ minutes, then attach your charm or keychain! Approx. 1″~ with 0.5″~ tall loop Plated metal Sourced in China, shipped by me from Alaska, USA Actual color may vary due to differences in lighting, device screen settings, etc.