The ornamental design for a razor handle, as shown and described.
FIG. 1 is a top perspective view of a razor handle design;
FIG. 2 is a first side view of the razor handle design;
FIG. 3 is a second side view of the razor handle design;
FIG. 4 is a front side view of the razor handle design;
FIG. 5 is a rear side view of the razor handle design;
FIG. 6 is a top plan view of the razor handle design;
FIG. 7 is an additional perspective view of the razor handle design; and,
FIG. 8 is a bottom perspective view of the razor handle design.
The contour lines along the handle that have been reduced to broken lines illustrate portions of the handle. The broken line cartridge illustrates the environment. None of the broken lines form part of the claimed design.