FIG. 1 is a perspective view of the front, top and right side of a slider for a slide fastener, showing our new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is a top plan view thereof; FIG. 5 is a bottom view thereof; and, FIG. 6 is a right side view thereof, the left side view being a mirror image thereof.