1 tire line. 33x13.50R20 tires sized to your wheels and your car.
A 33x13.50R20 stands 33 inches tall and 13.50 inches wide on a 20 inch rim, the metric equivalent is 343/48R20. A tire size only makes sense next to a wheel width and a car. 33x13.50R20 mounts on a range of widths, and the overall height decides whether the speedometer and the fender stay happy.
1 line carries 33x13.50R20, from Mickey Thompson. By type that is 1 all terrain. The tire has to stay near your car's stock height and mount on your wheel width, so pick the car and the wheel set and the page keeps only the 33x13.50R20 lines that do both.