I claim the ornamental design for a toilet seat ring, as shown and described.
FIG. 1 is a top perspective view of a toilet seat ring showing my new design.
FIG. 2 is a top plan view of the toilet seat ring shown in FIG. 1.
FIG. 3 is a front elevational view of the toilet seat ring shown in FIG. 1.
FIG. 4 is a rear elevational view of the toilet seat ring shown in FIG. 1; and,
FIG. 5 is a right side elevational view of the toilet seat ring shown in FIG. 1, the left side elevational view being a mirror image thereof.
The portions of the toilet seat ring shown in broken lines are included for illustrative purposes only and form no part of the claimed design. The bottom view is not a part of the claimed design.