Buckle

FIG. 1 is a top, front and left side perspective view of a buckle, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The features shown in broken lines show portions of the buckle that form no part of the claimed design.