The brush is thin with short bristles. The formula is on the wet side (but not too wet, the way I like it).
My lashes without mascara. (I have magenta liner on m lower lashline).
My lashes with the mascara. As you can see, it defines and lengthens a bit. I can't say much for volume, and it did clump up a bit. I dont' love this mascara but I don't hate it.