5ML. READ: wipe up any spills right away and only use as suggested - hung by the rear view mirror. How to use: remove wooden lid and remove the stopper. Replace the wooden but not too tight tip bottle upside down for a few seconds so oils soak into lid and ropes hang & enjoy! They are toxin free- pthalate , paraben free and California prop 65 compliant. They are essential oil Based and blended with certified clean fragrance.