Easily adjusts for optimum relief of foot and back fatigue. Scratch-resistant plastic platform with a large 18" x 14" non-slip platform for enhanced stability and non-slip rubber feet. Reduces leg pressure and helps to improve circulation and posture. 30 degree tilt massage surface. Three angle tilt settings (10°, 20° and 30°). Three height settings from a minimum or 2.5" high to a maximum of 4.5" high. Width: 18"; Height: 2.5" to 4.5"; Depth: 14"; Color(s): Gray.