I decided I need a new rigger brush. The cheap one I have annoys me by not holding any paint, so is practically useless. Since I live far away from any art store, I have to shop online, which is no problem except from the impossibility to know the actual size of a brush. So I turn to you, dear fellow painters, for advice. If I am to own one single rigger brush for painting tree branches and boat masts etc, which size should I choose? If you have any other recommendations, please feel free to tell me.