1 tire line. 265/55R20 tires sized to your wheels and your car.

265/55R20 means a 265 mm section width, a sidewall 55 percent of that (146 mm) and a 20 inch rim, which works out to 31.5 inches tall. Whether 265/55R20 works comes down to the wheel width it mounts on and how far it lands from the height the car left the factory with.
1 line carries 265/55R20, from Michelin. By type that is 1 highway. 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 265/55R20 lines that do both.