TaylorMade Products 31033, Pontoon Boat Corner Protector Fender, 90 Corner, 3.5 inch x 11.5 inch Designed for 90 degree square corners, will not fit rounded corners 90 degree corner is 3.5 wide and measures 8 down each side. It is 11.5  wide if measured directly from tip to tip Mount to the original factory installed aluminum corner, includes all stainless fasteners Constructed from a special Gray PVC formulated to match the aluminum color of the boat Designed to provide an air-cushioned impact when docking