I claim, the ornamental design for a mascara brush, as shown and described.
FIG. 1 is an isometric view of a mascara brush, showing my new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a first side elevation view thereof;
FIG. 5 is a second side elevation view thereof;
FIG. 6 is a top plan view thereof, enlarged to depict my claimed design more clearly; and,
FIG. 7 is a bottom plan view thereof, enlarged to depict my claimed design more clearly.
The broken line shown on the free end of the brush head in FIGS. 2–6 represents the bounds of the claim and the broken line showing of a handle represents a portion of the article neither of which forms part of the claimed design.