The ornamental design for a pair of automobile side skirts, as shown and described.
FIG. 1 is a perspective view of the exterior surface of the right side of a pair of automobile side skirts of the invention, the left side skirt being identical to the right side skirt, the interior surface of both side skirts having no ornamentality;
FIG. 2 is a perspective view of the exterior surface of the left side of a pair of automobile side skirts the right side skirt being identical to the left side skirt, the interior surface having no ornamentality; and,
FIG. 3 is a side view showing the exterior surface of the right side skirt illustrated in FIG. 1, the left side skirt being identical to the right side skirt, the interior surface having no ornamentality.
The broken line showing of environment is for illustrative purposes only and forms no part of the claimed design.