1 tire line. 37x13.50R26 tires sized to your wheels and your car.
37x13.50R26 is a flotation size: 37 inches tall, 13.50 inches wide, on a 26 inch wheel. In metric it is 343/41R26, which is how the catalogue stores it. Whether 37x13.50R26 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 37x13.50R26, from AMP. 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 37x13.50R26 lines that do both.