The ornamental design for a cosmeticbrush handle, as shown and described.
FIG. 1 is a perspective view of a cosmetic brush handle;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom view thereof;
FIG. 8 is a cross-sectional view of the cosmetic brush handle taken along the line 8-8 in FIG. 6; and,
FIG. 9 is a reference view showing the cosmetic brush handle in use.
The broken line showing in FIG. 9 is included for the purpose of illustrating unclaimed portions of the cosmetic brush handle and forms no part of the claimed design.