It is small compared to other eye brushes, the total length is just over 6 inches, but it is a full size brush.
It is a bit wide for some applications, but the flat, tapered shape makes it easy to use on one side as well. The width works well for doing a one-colour wash.
This brush is made of very soft squirrel hair and picks up colour very well. I've washed it countless times and it's retained both shape and firmness.