The ornamental design for a sideburnruler, as shown and described.
FIG. 1 is a perspective view of the sideburn ruler.
FIG. 2 is front view of the sideburn ruler.
FIG. 3 is a rear view of the sideburn ruler.
FIG. 4 is a right side view of the sideburn ruler.
FIG. 5 is a left side view of the sideburn ruler.
FIG. 6 is a bottom view of the sideburn ruler.
FIG. 7 is a top view of the sideburn ruler.
FIG. 8 is a view of the sideburn ruler in use; and,
FIG. 9 is an enlarged, partial view of the sideburn ruler.
The partial view is shown for convenience of illustration.
The broken lines shown in FIG. 8 illustrate environment. All other broken lines illustrate portions of the article. None of the broken lines part of the claimed design.