The ornamental design for a stirrupleather for an equestrian saddle, as shown and described.
FIG. 1 is a front top perspective view of a stirrup leather for an equestrian saddle showing my new design;
FIG. 2 is a rear bottom perspective view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a side view thereof;
FIG. 6 is an opposite side view thereof;
FIG. 7 is a front view thereof; and,
FIG. 8 is a rear view thereof.
The even-length broken lines represent stitching which form no part of the claimed design. The dash dot dash broken lines depict a symbolic break in the length of the article and form no part of the claim. The appearance of any portion between the symbolic break lines forms no part of the claimed design. The contrast of stippling density between the stirrup leather and the stirrup accent panel on the top surface represents a contrast of appearance.