Installation process: (1) - Measure your door length (Measure Twice Cut Once) (2) - Cut the Door Guard to the length you just measured (3) - Slip the Door Guard into your door (4) - Repeat the process around each door. How to install: 1. Place the trim under the sun for about 3-5 minutes (This step make the trim more flexible) 2. Gently place the door edge guard on the door so as to line it up with the contour of the door 3. Measure the length of the door edge, and cut the door guard to the length you just measured 4. Slip the door guard into your door 5. Make sure the position of the door edge guard is correct. The guard will slowly bend into the proper position as you apply taps. Once in place, do not remove, reposition, or reinstall the door edge guard How to choose the size: Ordinary Car: 5 meters for 4 doors vertical edge 8 meters for 4 doors vertical edge+bottom horizontal side 13 meters for 4 doors vertical edge+bottom horizontal side+bottom side of the trunk Off-road Vehicle SUV: 5 meters for 4 doors; 8 meters for 4 doors+bottom side of the trunk 10 meters for 4 doors+bottom side of the trunk+the hood Package List: 1 x protective strips for the car door Featrue 1:Anti-rub Trim Noise Insulation Featrue 2:Auto rubber mouldings Featrue 3:Car door protector Featrue 4:Bumper protector Featrue 5:Car Door Sealing Rubber Strip Featrue 6:Weatherstrip Edge Featrue 7:Anti-rub Trim Noise Insulation Featrue 8:Car door protection