FIG. 1 is a perspective view illustrating a mirror holder of my new design, comprising a mirror holder and showing a convex mirror therein;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side elevation view thereof, the left side elevation view being the mirror image thereof;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view illustrating a second embodiment of a mirror holder of my new design, comprising a mirror holder, and showing a flat mirror therein, the top, right and left side, rear and bottom views are the same as in FIGS. 3-6; and,

FIG. 8 is a front elevation view of FIG. 7.

Portions of the mirror holder are shown in broken lines in FIGS. 3-6 for illustrative purposes only and form no part of the claimed design.