Large!
I normally use a small circular scalp brush with more pointy ends, but this looked interesting so I thought I would give it a try. I think if you have a lot of hair this would be a great option! It has quite a lot of coverage to it, and really works the shampoo down to your scalp, it is easy to grip with the handle as well to give you good leverage.  I personally prefer the pointy tipped ones to stimulate my scalp more, but this is a great option if you don't like those.
Rating: 5 stars