For sale: AIMIKE Round Brush for Blow Drying, Large Round Hair Brush Nano Thermal Ceramic & Ionic Tech, for Blow Drying & Styling, Curling and Shine - (84mm,Barrel 53mm) 53mm-84mm including bristle. 【Choose the Right Size】The 53mm ceramic round brush (53mm barrel, 84mm total) is perfect for hair below the collarbone/chest length.