L'ANGE HAIR Le Volume 2-in-1 Titanium Blow Dryer Brush Hot Air Brush Blush 60

L'ANGE HAIR Le Volume 2-in-1 Titanium Blow Dryer Brush Hot Air Brush in One with Oval Barrel Hair Styler for Smooth, Frizz-Free Results for All Hair Types I think this is the 60mm but don’t know how to measure it. Any suggestions? It is in very good condition Works great Clean Model# AB0317 Unique oval-shaped barrel features 360° airflow and titanium plates to help smooth, shape, and volumize while quickly drying your hair.