D6 SPORTS 4 Mini Ramps with Fun Box-Black, Black Measures 63" in length, 52" in width, and 6" in height Underside of ramp has anti-slip grip strips for multi-surface adhesion Base has slightly wider, sturdy base to insure a good landing each time Textured surface for increased traction For multi-sport use: great for skateboarding, inline skating, and biking tricks