The Whirligig Spinner dimensions is 18 inches long. All of our wind spinners are constructed from an UV resistant Sun Tex fabric using intricate heavy duty stitching. All edges are stitched three times for maximum durability and the wind spinner is designed to stand up in the harshest types of wind and weather. These spinners are a perfect way to add a wow factor to your home or business as the spinner spins with the wind. The frame and mounting pole are made from fiberglass and all of our spinners include everything that you need to assemble the spinners.