A brush is a common tool used to apply makeup. A wide variety of brush styles are used in makeup, but flat and angle tipped brushes ranging from 1/8 to 5/8 seem to be the most popular. Besides shape and material, there is no signifigant difference between makeup brushes and artist brushes.
A powder brush is a soft, long-bristled round brush, approximately 1.5 in diameter at it's base and approximately 4 long including the handle. It is used to briskly remove excess Face powder from a subject at the end of makeup application.
A beard and mustache brush is a small short stiff-bristled brush which can be used to apply makeup to coarse hair, such as beards, mustaches, and sideburns.