We have a Painted Doll Brush Vintage item.  It is about 4" in l x about 1" in w.  I believe the base is painted wood and the bristles horsehair.  Some of the bristles lean to one side as shown in my photo due to something heavy being placed against it for years.  I'm not sure if anyone knows a trick to correct this defect.  I am selling it as is.  The back has a pretty floral design painted on it.

Painted Doll Brush Vintage