I have been using this brush to apply e/s shadow until I bought the LM's angled contour brush. I used to spend a fair amount of time applying e/s with this brush. It is fairly stiff and can be a slightly scratchy. I would not repurchase mainly because I'm extremely happy with my angled contour brush.
This is a fine brush for blending shadow in the crease of the eye. 3/4 " long with 6" long handle. It's natural hair and lasts well. It's not anything special and better could be found for less money.