The ornamental design for a razor handle, as shown and described.
FIG. 1 is a front perspective view of a design of a razor handle of the present invention;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The evenly spaced broken lines illustrate portions of the razor handle. The dash-dot-dash broken lines illustrate the boundary of the claimed design. None of the broken lines form part of the claimed design.