I claim the ornamental design for a sticker, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front view of a sticker showing a cyan embodiment of my new design;
FIG. 2 is a front view of a sticker showing a yellow embodiment of my new design;
FIG. 3 is a front view of a sticker showing a green embodiment of my new design;
FIG. 4 is a front view of a sticker showing an orange embodiment of my new design;
FIG. 5 is a front view of a sticker showing a red embodiment of my new design;
FIG. 6 is a front view of a sticker showing a purple embodiment of my new design; and,
FIG. 7 is a left side view thereof, the right side view, top view, and bottom view being identical.