Certainly not as large as they made it seem online.
If they made it the same size as their paddle brush it would be an HG but close enough.
If I detangle before, this really does soften and smooth my hair, just like a good conditioner, but on the go. In fact I think I may be crazy but I think the good distribution of oils makes my highlights look brighter.
I am a big believer in the 100 brush strokes rule. It's what made my hair so beautiful and lustrous as a child and a huge part of why it fell apart when I got lazy about haircare (ok and overzealous bleaching and heat styling could also be a cause).
Point is this activates and spreads hair's own natural conditioner that shouldn't go ignored.