This is a 14 Gauge Steel Diamond Plate Square Boat Trailer Fender. This fender size, as long as it is installed at the proper location and height, will accommodate most trailer tire sizes from 13 inch to 15 inch trailer tires. This 14 Gauge Steel Square Style Trailer Fender has the advantage of strength and durability over some other types of fenders. As seen in the pictures, this fender measures 10 inches wide, 32 inches long, and 13 inches high from the ground to the top of the fender. As far as installation of this fender, there are many ways. Both sides of this fender are slightly rounded but still present a flat surface, allowing for an easy welding surface, or even a bolt-on surface. In addition, sometimes fender brackets are welded to the trailers frame on the front and back of the fenders location. Check the measurements in the images to ensure this is the proper trailer fender for your application.