The Totally Tiffany Hang & Hold Bar measures 24 inches wide and each of the clamps is 2 inches wide. Each clamp measures 3.25 inches in height and requires a smooth flat surface to attach to. The surface needs to be between .5 up to 2.5 inches thick. To attach, simply tighten the clamp to securely fasten. However, take care not to over tighten and damage the surface. Imported.