How can you tell what kind of make-up brush a brush is?

i have a set of make-up brushes with no labels or booklet or anything, from sephora- 2 black 2 white, the black I know are blusher and angle brush, but the other two are smoother and finer and white- might they be foundation/concealer? i can't tell!How can you tell what kind of make-up brush a brush is?
The size of the brush roughly corresponds with the areas on the face it is to be used on. Make-up artists use a variety of brushes, all different sizes and textures, often these even include high quality paintbrushes!How can you tell what kind of make-up brush a brush is?
Um, your description isn't that great but...The bigger fuller ones are powder, big with short close together bristles are blush, then theres prolly a lip brush, eyeshadow brush,eyeliner brush.
i think it might be a concealer brush .... its for dotting ur concealer on before ur foundation....... lol or u can use it for eye shadow brush ... u go between ur brow line and down towards ur eye lids .... it makes it more natural and brings out ur eyes GOOD LUCK!
not for concealer or foundation..eyeshadow probably..
check out this link


http://www.lecosmetique.com/index.php?cP鈥?/a>