BrushesReviews Koyudo BP006 by Sonia G. 12 February, 2014 by Sonia G. 12 February, 2014 Let me Super Size you with the Koyudo BP006, with its 5.5cm diameter at the surface you better be warned, it’s a beast. Goat hair (Saikoho, Hakutotsuho), similar hair as… 0 FacebookTwitterPinterestEmail