I claim the ornamental design for a paddle blade, as shown and described.
FIG. 1 is a front elevational view of a paddle blade according to my new design, with the opposite side a mirror image thereof;
FIG. 2 is a side elevational view, with the opposite side a mirror image thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is a perspective view, with the opposite side a mirror image thereof.
The broken lines illustrated show portions of the paddle blade that form no part of the claimed design.
The broken lines illustrated within the interior portions of FIGS. 1 and 5, adjacent to solid line edges, define the bounds of the claimed design and form no part thereof.