Putting Mat Accessory

FIG. 1 is a perspective view of a putting mat accessory showing the claimed design, in an environment of use;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof; and,

FIG. 4 is a left-side elevational view thereof, the right-side elevational view, the front elevational view and the back elevational view being a mirror image thereof.

Broken lines in the figures show portions of the putting mat accessory and/or environmental structure that form no part of the claimed design. The diagonal lines/hatching shown on the vertical sides of the putting mat accessory represent the color green.