You would probably feel cheated if you were served a "standard size" drink in a restaurant or bar, given that a standard size is about a can of beer or a small glass of wine.
That's probably why people fool themselves into thinking they are drinking less than they are. If you drink more than 3 standard size drinks a day for women or more than 6 standard size drinks a day for men, you're on the way to injuring your brain.
Already, alcohol brain injury looms as a health crisis in Australia.
"Alcohol-related brain injury affects as many as one in eight Australians," Ms Berton said.
"It's slow, progressive and ultimately this damage affects a person's thinking, emotions, communication and ability to care for themselves." She said the damage was not confined to one demographic, affecting young and old, rich and poor, black and white, male and female.
"People need to understand that it's not a question of how much you have to drink to sustain an alcohol-related brain injury, but how little.