The ornamental design for a razor handle, as shown and described.
FIG. 1 is a right side elevational view of a razor handle;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top perspective view thereof.
The broken line showing of a razor blade head is included for the purpose of illustrating environmental structure and forms no part of the claimed design.