Contrary to what the name suggests the small extra is the 2nd largest pure bristle brush mason pearson offersbest suited for fine to normal hair of medium to long lengththis boar bristle brush is best for fine hair with 7 rings of extra stiff pure bristle tufts to stimulate blood flow to the hair roots each tuft contains bristles cut in 2 lengths the shorter bristles focus on cleaning and polishing the hair cuticle and the longer spired bristles collect and distribute natural oils that add